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INTERNATIONAL CONFERENCE ONQUANTUM INFORMATION AND QUANTUM COMPUTING

(ICQIQC 2013)

PROGRAMME and ABSTRACTS

IISc, Bangalore 7-11 January 2013

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Supporting academic institutions

Council of Scientific and Industrial Research

Supporting agencies

Board of Research in Nuclear Sciences

Harish-Chandra Research Institute, Allahabad

Indian Institute of Science, Bangalore

Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore

Quantum Information Group, Institute of Mathematical Sciences, Chennai

Raman Research Institute, Bangalore

Tata Institute of Fundamental Research, Mumbai

Space-time

The International Conference on Quantum Information and Quantum Computing starts at 17:00 on January 6, andends at 20:30 on January 11. The conference venue is the Faculty Hall, Main Building, Indian Institute of Science,Bangalore.

Registration

The registration opens at 17:00 on 6 January, on the ground floor of the Physical Sciences Building.From 8:00 on 7 January onwards, the registration and information desk shifts to the Faculty Hall Foyer.

Welcome Reception

The conference welcome reception takes place at 19:00 on 6 January, on the lawns of the Jawahar Visitors House, IISccampus.

Food

The participants should have breakfast at their place of accommodation. During 7-11 January, lunch and dinner forregistered participants have been arranged in the Guest House reception area, IISc.

Transport

Taxis and vans have been arranged to transport participants between the Green Path hotel/the United TheologicalCollege hostel and IISc. The pick-up time in the mornings is 8:00, and the return time in the evenings is after dinner.

Banquet

The conference banquet is at 19:00 on 8 January, at the Taj Vivanta, Yeshwantpur. Vehicles have been arranged totransport the participants between IISc and Taj Vivanta.

Cultural Programme

A combined Indian classical dance and music performance (Bharatanatyam and Veena) has been arranged at 18:00 on10 January, in the J.R.D. Tata auditorium of the National Institute of Advanced Studies, IISc campus.

Travel Desk

To assist the participants in their travel and sight-seeing plans, a travel desk has been arranged, next to the registrationand information desk.

Local Contact Information

Overall Conveners:Prof. Apoorva Patel 97412-94802Prof. Anil Kumar 98454-21938

Accommodation and Transport Arrangements:Dr. Subroto Mukerjee 94817-89167

Registration:Prof. Vasant Natarajan 94498-27574

Catering and Food:Prof. Arindam Ghosh 98800-64200

Faculty Hall Management and Poster Presentations:Dr. P.S. Anil Kumar 98863-72499

Banquet and Cultural Programme:Dr. Kota Murali 97409-66884

Physics Department Office:Mr. Srivatsa 080-2293-3334

International Advisory CommitteeScott Aaronson Cambridge, USAGirish S. Agarwal Oklahoma, USAAlain Aspect Paris, FranceCharles H. Bennett IBM-Yorktown Heights, USASougato Bose London, UKGilles Brassard Montreal, CanadaSamuel L. Braunstein York, UKHans J. Briegel Innsbruck, AustriaCarlton M. Caves Albuquerque, USAArtur Ekert Oxford, UK and NUS, SingaporeLov K. Grover Murray Hill, USAJozef Gruska Brno, Czech RepublicDipankar Home Kolkata, IndiaJaewan Kim Seoul, KoreaRaymond Laflamme Waterloo, CanadaAnthony J. Leggett Urbana-Champaign, USAMaciej Lewenstein Barcelona, SpainDaniel Lidar Los Angeles, USASeth Lloyd Cambridge, USAArchan S. Majumdar Kolkata, IndiaJohn Preskill Pasadena, USAS.M. Roy Mumbai, IndiaR. Simon Chennai, IndiaUmesh Vazirani Berkeley, USAVlatko Vedral Oxford, UK, and SingaporeYoshihisa Yamamoto Stanford, USA, and Tokyo, Japan

National Organizing CommitteeP.S. Anil Kumar IISc, BangaloreArvind IISER, MohaliArindam Ghosh IISc, BangaloreN.D. Hari Dass CMI, ChennaiGuruprasad Kar ISI, KolkataH.R. Krishnamurthy IISc, BangaloreAnil Kumar IISc, BangaloreT.S. Mahesh IISER, PunePrabha Mandayam IMSc, ChennaiSubroto Mukerjee IISc, BangaloreKota Murali IBM, BangaloreVasant Natarajan IISc, BangaloreRahul Pandit IISc, BangalorePrasanta Panigrahi IISER, KolkataApoorva Patel IISc, BangaloreArun K. Pati HRI, AllahabadK.V. Ramanathan IISc, BangaloreAditi Sen De HRI, AllahabadDiptiman Sen IISc, BangaloreUjjwal Sen HRI, AllahabadUrbasi Sinha RRI, BangaloreC.E. Veni Madhavan IISc, Bangalore

Monday 07 January 2013

Registration - Faculty Hall, Main Building (08:30-08:45)

Inauguration - Faculty Hall, Main Building (08:45-09:00)

Welcome - Faculty Hall, Main Building (08:45-09:00)

- Presenters: Prof. PANDIT, Rahul; Prof. KUMAR, Anil

Session 1 - Faculty Hall, Main Building (09:00-10:30)

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09:00 Experimental Quantum Error Correction Presenter: LAFLAMME, RaymondThe Achilles' heel of quantum information processors is the fragility of quantum states and processes. Without a method tocontrol imperfection and imprecision of quantum devices, the probability that a quantum computation succeeds willdecrease exponentially in the number of gates it requires. In the last fifteen years, building on the discovery of quantumerror correction, accuracy threshold theorems were proved showing that error can be controlled using a reasonable amountof resources as long as the error rate is smaller than a certain threshold. We thus have a scalable theory describing how tocontrol quantum systems. I will briefly review some of the assumptions of the accuracy threshold theorems and commenton recent experiments that have been done and should be done to turn quantum error correction into an experimentalreality.

09:45 Key Establishment a la Merkle in a Quantum World Presenter: BRASSARD, GillesIn 1974, Ralph Merkle proposed the first unclassified scheme for secure communications over insecure channels. Whenlegitimate communicating parties are willing to spend an amount of effort proportional to some parameter N, aneavesdropper cannot break into their communication without expending an effort proportional to N^2, which is quadraticallymore than the legitimate effort. However, Merkle's original scheme becomes completely insecure against a quantumadversary. Can its security be restored (at least partially) if the legitimate parties are also allowed to use quantumcomputation? We give two novel key agreement schemes in the spirit of Merkle's. The first one requires an effortproportional to N^{5/3} to be broken by a quantum adversary. In the second scheme, the legitimate parties are purelyclassical, yet it cannot be broken by a quantum eavesdropper who is not willing to work significantly harder than thelegitimate parties, making it the first provably secure post-quantum cryptographic scheme in the random oracle model. Inthese schemes, as opposed to quantum key distribution, all communication is classical. No prior knowledge ofcryptography will be assumed.

Tea/coffee break - Faculty Hall Foyer, Main Building (10:30-11:00)


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11:00 Spin Filtering, Internal Exchange Interactions: Towards Molecular Data Storage and Manipulations? Presenter: MOODERA, JagadeeshBilayer systems consisting of a ferromagnet and a normal layer can show huge internal exchange fields, and whencombined with a counter electrode to form a tunnel junction can yield large spin polarization as well as magnetoresistance.A phenalenyl organic molecular layer in close proximity to a ferromagnet can show unexpected magnet and spin filteringphenomena down to a monolayer/bilayer level. These will be shown and discussed.

11:45 Dynamics of Entanglement under Environmental Perturbations and its Control Presenter: AGARWAL, GirishWe consider general features of the dynamics of quantum entanglement under environmental perturbations and under theaction of other unavoidable devices like amplifiers. We argue quite generally that one needs to make the evolution nonmarkovian to slow down the loss of entanglement. The results would be illustrated by a number of examples using bothqubits and continuous variables.

International Conference on Quantum Information and Quantum Computing (ICQIQC) / Programme

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Lunch - Guest House Lawns (12:30-14:00)


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14:00 Witnesses for Teleportation, Discord and Purity Presenter: MAJUMDAR, ArchanWe describe mechanisms for detecting three useful but different quantum information processing resources in unknownstates, viz., (i) utility as teleportation channel, (ii) quantum correlations beyond entanglement, and (iii) purity, respectively.

14:30 Extremal Extensions of Entanglement Witnesses and PPT Entangled States Presenter: ARVINDPPT entangled states are very interesting objects and their entanglement is typically unearthed using positive maps whichare not completely positive. The talk will give an overview of the field and also describe some of our recent results.

15:00 Bound-entanglement is Not a Rare Phenomenon for Gaussian States Presenter: R, SimonHorodecki, Cirac, and Lewenstein have shown that bound-entanglement for continuous variables is a rare phenomenon.We examine this issue in the case of Gaussian states, and show that in this restricted case bound-entanglement is NOT arare phenomenon. The significance of this result is that it encourages the hope of actually producing in the laboratorycontinuous variable bound-entangled states.



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16:00 Quantum Simulations by NMR Presenter: DU, Jiangfeng

16:30 Recent Developments in Quantum Information Processing by NMR Presenter: KUMAR, AnilAfter a brief introduction to NMR Quantum Information Processing, the following recent developments in our laboratory willbe described. 1. Universal quantum computation in NMR using Genetic Algorithm. Gates, PPS and singlet state (BellState) creation. 2. Quantum Simulation of Dzyaloshinsky-Moriya (DM) interaction in presence of Heisenberg XY interaction,by NMR using Genetic Algorithm. 3. Quantum simulation of frustration in quantum transverse Ising spin system by NMR.

Free time - Main Building (17:00-19:00)

Dinner - Guest House Lawns (19:00-20:30)


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Tuesday 08 January 2013


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09:00 Quantum Tomography Presenter: SUDARSHAN, E C GeorgeQuantum Computation is carried out with the use of qubits which are two level Quantum Mechanical systems, whosestates are represented by 2x2 complex hermitian matrices of unit trace. The determination of the state of such a system isalready familiar from the traditional analysis of the polarization states of a light beam. Such an analysis involves the use ofphotometers, quarter wave plates, polarisers and analysers. The subject of Quantum Tomography is the study of multiple,coupled qubits. Each of these processes is a partial detection of the result of "measurements " which may be representedby the Pauli matrices for each qubit. We may use these as successive steps in a tomographic analysis. Tomographyrelates to the determination of a two dimensional distribution, in terms of an infinity of line integrals as originally introducedby Radon. This can be used for medical diagnostics, structure determination in Engineering applications etc. When thedistribution is a complex valued wave function, the methods become applicable to Quantum Tomography. In the presenceof entanglement, we need to do quantum process tomography.

09:45 Quantum Dot Spin-Photon Entanglement via Frequency Downconversion to Telecom Wavelength Presenter: YAMAMOTO, YoshihisaLong-distance quantum teleportation and quantum repeater technologies require entanglement between a single matterquantum bit (qubit) and a telecommunications (telecom)-wavelength photonic qubit. Electron spins in III-V semiconductorquantum dots are among the matter qubits that allow for the fastest spin manipulation and photon emission, butentanglement between a single quantum-dot spin qubit and a flying (propagating) photonic qubit has yet to bedemonstrated. Moreover, many quantum dots emit single photons at visible to near- infrared wavelengths, where silicafibre losses are so high that long-distance quantum communication protocols become difficult to implement. Here wedemonstrate entanglement between an InAs quantum-dot electron spin qubit and a photonic qubit, by frequencydownconversion of a spontaneously emitted photon from a singly charged quantum dot to a wavelength of 1,560nanometres. The use of sub-10-picosecond pulses at a wavelength of 2.2 micrometres in the frequency downconversionprocess provides the necessary quantum erasure to eliminate which-path information in the photon energy. Together withpreviously demonstrated indistinguishable single-photon emission at high repetition rates, the present technique advancesthe III-V semiconductor quantum-dot spin system as a promising platform for long-distance quantum communication.



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11:00 Higher-order Interferences of Single Photons Presenter: WEIHS, GregorUsing a three- and a five-path interferometer and single photons derived from a heralded single photon sources we havebeen able to put tight bounds on potential higher-order interferences and on the possibility of quaternion-based quantummechanics.


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11:30 Multi-dimensional Quantum Systems: Two is Company but Three is still not a Crowd Presenter: SINHA, UrbasiThis talk will cover a few experiments and theoretical proposals that I have been working on in recent times. The firstexperiment describes a precision test for Born rule for probabilities in quantum mechanics. As one of the postulates ofquantum mechanics, Born's rule tells us how to get probabilities for experimental outcomes from the complex wavefunction of the system. It's quadratic nature entails that interference occurs in pairs of paths. An experiment was done atthe Institute for Quantum Computing, Canada that sets out to test the correctness of Born's rule by testing for the presenceor absence of genuine three-path interference. This is done using single photons and a triple slit aperture [1,2,3,4]. In thenext experiment I will describe the usage of the triple slit system to demonstrate a stable qutrit. The qutrit levels areencoded in the spatial modes of single photons which are incident on the system of triple slits. Our set-up demonstrates avery simple qutrit which allows for tomographic reconstruction of generalized states. We have used our qutrit to perform thefirst ever experimental verification of the Aharon-Vaidman quantum game which exemplifies the advantage of using simplequantum systems to outperform classical strategies. The quantum version of the game is a specific example of a systemwhere the quantum effects can be demonstrated even when all parties play the game at the same location and is thusconceptually distinct from the games using Bell-type entanglement. Our experiment therefore demonstrates that a quantumadvantage is possible even when the underlying property is not entanglement. Furthermore, one of the main experimentalchallenges in demonstrating a truly “quantum” version of the game lies in the fact that most approaches involveintermediate measurement steps which could lead to decoherence thus rendering any future quantum moves meaningless.In this experiment however, we are free from such loss of information [5]. In the last part, I will describe some recenttheoretical work involving Feynman’s path integral formalism which aims to provide theoretical insight to the type ofexperiments discussed earlier [6].

12:00 Multiparty Quantum Correlations in Many-body Systems Presenter: SEN, UjjwalThe recent developments in computation and communication tasks have underlined the necessity to preserve quantumcoherence in states shared by a large number of quantum systems. Such exciting developments on the theoretical frontwere accompanied by several experimental proposals and realizations, by using e.g. photons, ion traps, cold atoms, andnuclear magnetic resonance. I will introduce a macroscopic state and show that in contrast to other existing states, it hasquantum coherence that is resistant to the twin effects of environmental noise -- local decoherence on all the particles andloss of a finite fraction of its particles. The nature of quantum correlations also holds the key in the understanding ofnonclassical phenomena such as quantum phase transitions in spin systems. I will discuss about our recent works wherewe employ a genuine multipartite entanglement measure, the generalized geometric measure, for investigating thequantum phase transition in an infinite quantum spin-1/2 chain with two-spin as well as three-spin interactions. We showthat in contrast to bipartite entanglement of the ground state, the genuine multiparty one unerringly indicates the quantumphase transition in the system. The system lends itself to a complementary behavior between bipartite and genuinemultipartite entanglements.



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14:00 The Quantum Substate Theorem Presenter: NAYAK, AshwinConsider quantum states rho, sigma in the same finite dimensional Hilbert space. We say that rho is a c-substate of sigmaif rho <= 2^c sigma, where <= represents the Lowner partial order. This may be used to construct the state rho from sigma,much like we may generate fair coin tosses from biased ones through rejection sampling. The success probability of theprocess is then 1/2^c. We are interested in how well sigma simulates rho in the above sense. In other words, we areinterested in the least c such that rho is a c-substate of sigma. This quantity is the relative min-entropy of the two states.For typical applications, such as privacy trade-offs in communication protocols, it suffices to construct an approximationrho' to rho, with respect to a metric on quantum states. This leads us to the notion of the *smooth* relative min-entropy ofthe two states. If rho is a c-substate of sigma, i.e., their relative min-entropy is at most c, then their relative entropy is alsoat most c. Jain, Radhakrishnan and Sen (2002) gave a weak converse to this relation via the Quantum Substate Theorem.This gives a bound on the eps-smooth relative min-entropy in terms of the more familiar notion of relative entropy. Wepresent alternative proofs of the Quantum Substate Theorem, also strengthening it in the process. The proofs that wepresent are both shorter and conceptually simpler than the original proof.


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14:30 Unextendible Mutually Unbiased Bases Presenter: MANDAYAM, PrabhaMutually Unbiased Bases play an important role in our understanding of complementarity in quantum mechanics and arecentral to most quantum cryptographic tasks. A set of MUBs is said to be unextendible if there does not exist another basisthat is unbiased with respect to the given set. While constructions of complete sets of (d + 1) MUBs in dimension d = 2^nare known, we prove the existence of smaller, unextendible sets of MUBs in these dimensions. In particular, we provide aconstruction of unextendible sets of (d + 1) MUBs in d = 2^n , using commuting classes of Pauli operators. Furthermore,our construction identifies sets of n-qubit Pauli operators that lead to state-independent proofs of the Kochen-Speckertheorem in 2^n dimensions.

15:00 Measurement-Induced Non-locality in an n-partite Quantum State Presenter: JOAG, PramodWe generalize the concept of measurement-induced non-locality (MiN) to n-partite quantum states. We get exact analyticalexpressions for MiN in an n-partite pure and n-qubit mixed state. We obtain the conditions under which MiN equalsgeometric discord in an n-partite pure state and an n-qubit mixed state. We relate MiN and Meyer-Wallach measure ofentanglement in multipartite pure states.


Group Photograph - In front of J.N. Tata Statue (16:00-16:15)

Poster Session - Faculty Hall Foyer, Main Building (16:15-17:30)

Public Lecture - Faculty Hall, Main Building (17:30-18:30)

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17:30 The Second Quantum Revolution: Harnessing the quantum properties of nature Presenter: LAFLAMME, RaymondWe are at the dawn of a new technological revolution. Just as the 19th century was the Machine Age and the 20th centurywas the Information Age, the 21st century promises to go down as the Quantum Age. Harnessing and controlling thecounter-intuitive properties of quantum mechanics will enable previously unimaginable technologies that will transform theways we work, communicate and live. Quantum information processing forces us to learn a new language---one thatdescribes the behaviours and interactions of the universe's most fundamental building blocks. We are now learning tospeak this quantum language---to control quantum systems and apply them toward unprecedented applications in thelaboratory and beyond. We are discovering new ways to navigate the nano-scale world, and we are tapping into theincredible potential of quantum computers, sensors, communications devices and more. Quantum technologies are alreadyfinding real-world applications, and the fundamental groundwork is now being laid for revolutionary advances in the comingyears, from ultra-powerful computers to unbreakable cryptography and more. I will describe some of the recent progress inthe field, particularly in the experimental realm, such as implementations of algorithms on small quantum processors---animportant demonstration of control over the quantum world. I will conclude by exploring some of the unexpected offshootsof quantum information research, such as advances in neutron interferometry and oil exploration.


Banquet - Strategy Hall, Taj Vivanta (19:00-21:30)


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Wednesday 09 January 2013


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09:00 Low Decoherence Silicon-based Electron Spin Qubits Presenter: LYON, StephenQubits with long coherence are required for quantum information applications. It has been known for decades that electronspins in Si have long relaxation times, but it was often assumed that embedding the qubits into a solid host would limit theircoherence to a millisecond, or so. However, improvements in materials and measurements have steadily increased themeasured spin coherence of electrons in Si. I will discuss recent ensemble Electron Spin Resonance (ESR) measurementswhich find that electrons bound to donors in silicon can have very long spin coherence times - 3 or 4 orders of magnitudelonger than a millisecond. Free electrons, on the other hand, remain coherent for only a few microseconds; a simpleconsequence of phonon scattering and the spin-orbit interaction. Lithographically-defined quantum dots are being activelypursued by several groups, since these electrons can be manipulated with gate electrodes while remaining bound and thuspromising long spin coherence. I will discuss ESR experiments on arrays of Si/SiGe quantum dots where we find thatbinding electrons into dots improves their spin coherence by at least 2 orders of magnitude relative to free electrons,though it is still shorter than seen with the donors.

09:45 Entangled Photon Triplets Presenter: JENNEWEIN, ThomasNon-classical states of light, such as entangled photon pairs and number states, are essential for fundamental tests ofquantum mechanics and optical quantum technologies. The most widespread technique for creating these quantumresources is spontaneous parametric down-conversion of laser light into photon pairs. Conservation of energy andmomentum in this process, known as phase-matching, gives rise to strong correlations that are used to producetwo-photon entanglement in various degrees of freedom. It has been a longstanding goal in quantum optics to realize asource that can produce analogous correlations in photon triplets, but of the many approaches considered, none has beentechnically feasible. In the first part of the talk, we report the observation of photon triplets generated by cascadeddown-conversion [1]. Each triplet originates from a single pump photon, and therefore quantum correlations will extendover all three photons in a way not achievable with independently created photon pairs. Our photon-triplet source will allowexperimental interrogation of novel quantum correlations, the generation of tripartite entanglement without post-selectionand the generation of heralded entangled photon pairs suitable for linear optical quantum computing. Two of the tripletphotons have a wavelength matched for optimal transmission in optical fibres, suitable for three-party quantumcommunication. Furthermore, our results open interesting regimes of non-linear optics, as we observe spontaneousdown-conversion pumped by single photons, an interaction also highly relevant to optical quantum computing.

Entangled quantum particles have correlations stronger than those allowed by classical physics. These correlations are atthe heart of deep foundational questions in quantum mechanics and form the basis of many emerging quantumtechnologies. Although the discrete variables of up to 14 ions and the continuous variables between three intense opticalbeams have been entangled, it has remained an open challenge to entangle the continuous properties of three or moreindividual particles. In the second part of the talk, we report an experimental demonstration of genuine tripartitecontinuous-variable entanglement between three separated particles [2]. In our set-up the three particles are photonscreated directly from a single input photon; the creation process leads to quantum correlations between the energies andemission times of the photons. The entanglement between our photons is the three-party generalization of theEinstein–Podolsky–Rosen correlations for continuous variables, and could serve as a valuable resource in a wide variety ofquantum information tasks.



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11:00 Qudit Communication Network Presenter: KIM, JaewanOptical coherent states can be interpreted as d-dimensional quantum systems, or qudits of even superposition ofpseudo-number states. Cross-Kerr nonlinear interaction can generate the maximal entanglements of pseudo- phase andpseudo-number states from two opticl coherent states. Extended network of these entangled coherent states is a quditcluster state and can be used as qudit communication network for d-dimensional teleportation or multi-user quantumcryptographic network.


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11:30 Multiparty Quantum Correlation and its Application in Quantum Communication Presenter: SEN DE, AditiRecent developments in computation and communication tasks have underlined the necessity to preserve quantumcoherence in states shared by a large number of quantum systems. Such exciting developments on the theoretical frontwere accompanied by several experimental proposals and realizations, by using e.g. photons, ion traps, cold atoms, andnuclear magnetic resonance. I will introduce a macroscopic Schrodinger cat state and show that in contrast to otherproposed cat states, it has quantum coherence that is resistant to the twin effects of environmental noise -- localdecoherence on all the particles and loss of a finite fraction of its particles. We will also establish a universalcomplementarity relation between the capacity of classical information transmission by employing a multiparty quantumstate as a multiport quantum channel, and the genuine multipartite entanglement of that quantum state. The relation holdsfor arbitrary pure or mixed quantum states of an arbitrary number of parties in arbitrary dimensions.

12:00 Quantum Correlations are Physical Presenter: PATI, ArunErasure of information stored in a quantum state requires energy cost and is inherently an irreversible operation. Ifquantumness of a system is physical, does erasure of quantum correlation as measured by discord also need some energycost? In this talk, I will show that change in quantum correlation is never larger than the total entropy change of the systemand the environment. The entropy cost of erasing correlation has to be at least equal to the amount of quantum correlationerased. Hence, quantum correlation can be regarded as genuinely physical. We show that the new bound leads to theLandauer erasure. The physical cost of erasing quantum correlation is well respected in the case of bleaching of quantuminformation, thermalization, and can have potential application for any channel leading to erasure of quantum correlation.


Free Afternoon - (14:00-20:00)


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Thursday 10 January 2013


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09:00 Computing Immanants from Photon Coincidences Presenter: SANDERS, BarryPredicting photon-coincidence probabilities for multi-channel interferometers with single photons entering each input port iscomputationally hard. The problem can be turned around by using the interferometer as a computational tool to computethese distributions. We show how photon coincidence rates as functions of delay times between input photons revealimmanants (with determinants and permanents as special cases) of the interferometer transformation matrix.Interferometers could serve as a natural purpose-built (non-universal) quantum computer for solving non-trivialcomputational problems. We show that the famous Hong-Ou-Mandel two-photon dip is a special case of this result.

09:45 Quantum Measurement and Feedback with Superconducting Circuits Presenter: RAJAMANI, VijayaraghavanRecent advances in superconducting parametric amplifiers have enabled high fidelity measurements of superconductingquantum bits (qubits) near the quantum limit. I will describe experiments where we measure the state of a superconductingqubit coupled to a microwave cavity. This architecture has been named circuit Quantum Electrodynamics (cQED) and isanalogous to the Cavity QED architecture in atomic physics where an atom is coupled to a cavity. We implement the qubitby using the two lowest levels of an anharmonic oscillator constructed using a capacitively shunted aluminum Josephsonjunction. The microwave cavity is an aluminum waveguide cavity. The qubit state modifies the resonant frequency of thecavity and can thus be measured by probing the cavity using microwaves. A central feature of this measurement process isthe entanglement between the qubit and the coherent microwave field (the pointer) exiting the cavity. The use of parametricamplifiers to analyze the microwave field enables us to observe this entanglement with high fidelity. We reconstructquantum trajectories of the qubit state as it evolves during measurement and show that the final state of the qubit isconsistent with the trajectories. Further, we use quantum feedback to actively steer the state of the qubit and demonstrateRabi oscillations which persist indefinitely. Finally, I will discuss how we can use the pointer states to generateentanglement between remote qubits and stabilize them using feedback. Applications to measurement based quantumcontrol and quantum computing will also be discussed.



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11:00 Quantum Energy Protocol in the Quantum Hall System Presenter: YUSA, GoIn this presentation, we show a theoretical proposal for an experimental method to verify a quantum protocol termedquantum energy teleportation (QET)[1], which allows energy transportation to a remote location without physical carriers.We use chiral edge channels in a quantum Hall system and their zero-point fluctuations as an experimental system[2]. Wediscuss the physical significance of this quantum energy protocol and estimate the order of energy gain using reasonableexperimental parameters.

11:30 Towards Quantum Dot Based Planar Integrated Circuits for Quantum Information Processing Presenter: ACHANTA, Venu GopalQuantum dots (QDs) are solid state equivalent of atoms though they differ from the atoms as they decohere due toenvironmental interactions. Origin and control of decoherence is interesting for high fidelity device development. There aremany proposals for coupled QDs based architectures for quantum computing. Due to fabrication challenges, compared tovertically stacked QDs, it is easier to get uniform dots in plane. Thus, planar architectures are more realizable with presentday technologies. QD spins are considered better qubits due to their long lifetimes. For planar quantum informationprocessing circuits, thus coupling QD spin to photon is important. We present results on single quantum dots where theacoustic phonon mediation is shown as the dominant dephasing mechanism. In addition, we present planar photoniccrystal based structures for coupling QD spin to photons. In a device with linear crossed waveguides, we demonstrate thatQD spin can be mapped by measuring which path the photons take.


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12:00 Interplay of Quantum Coherence and Environmental Noise in Biological Processes: Case of AvianMagneto-reception Presenter: BANDYOPADHYAY, JayendraRecently there has been a growing interest in the application of quantum mechanics to understand many biologicalprocesses, namely photosynthesis, process of olfaction, avian magneto-reception, etc. These interests have broughtphysicists, chemists, and biologists at the same platform, and lead to the beginning of a new interdisciplinary field called‘Quantum Biology’. A major motivation of these studies is to understand how nature utilizes certain pure quantumphenomena like coherence or entanglement to optimize biological processes. Importantly, these natural processes takeplace at normal temperature and without any isolation from its environment. Quantum information community is particularlyinterested to understand these biological processes because of its probable application in the development of quantumcomputer at normal temperature. In this talk, I will give a brief overview of few "quantum" biological processes, and willfocus mostly on the proposed Spin-dependent Radical Pair based model of the avian magneto-reception process. I willalso discuss how nature uses environmental noise in very optimal way to enhance sensitivity of the magneto-receptionprocess.


Session 12 - Physical Sciences Auditorium (14:00-15:30)

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14:00 Macrorealism via entropic Leggett-Garg inequalities Presenter: SUDHAA foundational concept of classical world that is at variance with the quantum description is macrorealism. The notion ofmacrorealism rests on the classical world view that (a) physical properties of a macroscopic object exist independent of theact of observation and (b) measurements are non-invasive i.e., the measurement of an observable at any given instant oftime does not influence its subsequent evolution. Quantum predictions differ at a foundational level from these twocontentions. In 1985, Leggett and Garg proposed an inequality to test whether a single macroscopic object exhibitsmacrorealism or not. The Leggett-Garg correlation inequality (formulated originally for dichotomic observables) is satisfiedby all macrorealistic theories and is violated if quantum law governs. We discuss entropic Leggett-Garg inequalitydeveloped following the approach for spatially separated entangled bipartite systems proposed by Braunstein and Caves.We discuss how macrorealistic tenet encrypted in the form of classical entropic inequality get defeated in the quantumrealm.

14:30 NMR Investigations of Leggett-Garg Inequality Presenter: T S, MaheshDistinguishing quantum from classical behavior has been an important issue since the development of quantum theory.Violations of Bell-type inequalities demonstrate the non-classical correlations between spatially separated objects, whilethe violations of Leggett-Garg inequality (LGI) demonstrate the non-classical correlations of a single dynamical system atdifferent time instants. In recent years, various protocols for implementing LGI and its refined versions have been proposedand experimentally demonstrated. We describe the experimental implementation of a protocol for testing LGI for nuclearspins precessing in an external magnetic field. The implementation involves certain controlled operations, performed inparallel on pairs of spin 1/2 nuclei (target and probe) from molecules of a nuclear magnetic resonance (NMR) ensemble,which enable evaluation of temporal correlations from an LG string. Our experiment demonstrates violation of the LGI fortime intervals between successive measurements, over which the effects of relaxation on the quantum state of target spinare negligible. We also describe an experimental study of recently formulated entropic Leggett-Garg inequality (ELGI) byUsha Devi et al. (arXiv: 1208.4491v2 (2012)). This inequality places a bound on the statistical measurement outcomes ofdynamical observables describing a macrorealistic system. We have studied ELGI using a two-qubit NMR system. Toperform the noninvasive measurements required for the ELGI study, we prepare the system qubit in a maximally mixedstate as well as use the ‘ideal negative result measurement’ procedure with the help of an ancilla qubit. As predicted byquantum theory, the experimental results show a clear violation of ELGI by over four standard deviations. The violation ofELGI is attributed to the fact that certain joint probabilities are not legitimate in the quantum scenario, in the sense they donot reproduce all the marginal probabilities. Using a three-qubit system, we have experimentally demonstrated thatthree-time joint probabilities do not reproduce certain two-time marginal probabilities.


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15:00 Quantum Simulation via Filtered Hamiltonian Engineering Presenter: AJOY, AshokWe propose a method for Hamiltonian engineering in quantum information processing architectures that requires no localcontrol, but only relies on collective qubit rotations and field gradients. The technique achieves a spatial modulation of thecoupling strengths via a dynamical construction of a weighting function combined to a Bragg grating. As an example, wedemonstrate how to generate the ideal Hamiltonian for perfect quantum information transport between two separatednodes of a large spin network. We engineer a spin chain with optimal couplings from a large spin network, such asnaturally occurring in crystals, while decoupling all unwanted interactions. For realistic experimental parameters, ourHamiltonian engineering method can be used to drive perfect quantum information transport at room-temperature.

Tea/coffee break - Physical Sciences Building (15:30-16:00)

Session 13 - Physical Sciences Auditorium (16:00-17:00)

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16:00 Quantum Simulators of Lattice Gauge Theories Presenter: LEWENSTEIN, MaciejAfter a short introduction devoted to the general aspects of the theory of quantum simulators, I will discuss recenttheoretical and experimental developments toward the realization simulators of lattice gauge fields and lattice gaugetheories with ultracold atoms, ions, molecules or Rydberg atoms. Particular attention will be paid to external non-Abeliangauge field that lead to various types of topological states, and to quantum simulators of non-Abelian gauge theories.

16:30 Phases, Transitions and Boundary Conditions in a Model of Interacting Bosons Presenter: PAI, RameshWe study the extended Bose Hubbard model in one dimension using the density matrix renormalization group. We find avariety of phases at commensurate filling: Superfluid, Mott insulator, density wave and Haldane insulator. In particular wedeterimine the universality classes of the transitions between the different phases by obtaining the relevant criticalexponents. We show that there exist Ising, Kosterlitz-Thouless and Gaussian phase transitions in addition to adiscontinuous phase transition. We also highlight the importance of boundary conditions, showing that different ones whichcorrespond to the same conventional thermodynamic limit can give different phase diagrams.

Free time - Physical Sciences Building (17:00-18:00)

Cultural Programme - J.R.D. Tata Auditorium (18:00-20:00)

Dinner - Green House (20:00-21:30)


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Friday 11 January 2013


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09:00 Quantum Simulation of Exactly Solvable Models Presenter: KOREPIN, VladimirWe consider one dimensional models of may body quantum mechanics. Matrix product states provide a goodapproximation for the ground state. Analytical expression exist for the ground state of some models. We reformulatedtensor networks so that they give the exact formula, when that is available.

09:45 Optical Communications at the Quantum Limit Presenter: DUTTON, ZacharyIn the last decade, significant progress has been made towards understanding the fundamental limits of classicalcommunication on optical channels, with the Holevo bound giving am achievable quantum bound to the classical capacity.Remarkably, coherent (laser) states of light are sufficient to achieve this capacity. However, non-standard and heretoforeunknown receivers and coding are needed to achieve this capacity. In this talk I will discuss our recent theoretical andexperimental work on joint detection receivers, which perform joint quantum measurements across multiple pulses, as wellas associated coding techniques. In particular I will present our demonstration of the conditional pulse nulling receiver withdemodulation error rate of pulse-position modulation codewords below the standard quantum limit, and our development ofthe Green Machine, able to increase the capacity of coded binary-phase-shift-keyed (BPSK) modulation. I will also discussour recent theoretical breakthrough on a receiver concept to achieve the minimum-probability-of-error in discrimination ofan arbitrary number of coherent states. These techniques can be applied in future communications systems to reducecoding latency and greatly increasing the power efficiency (bits per photon).



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11:00 Study of Nanomechanical Two-level Systems: Possibility of Studying Coherent Control Presenter: DESHMUKH, MandarWe study InAs nanowire resonators fabricated on sapphire substrate with a local gate configuration. The key advantage ofusing an insulating sapphire substrate is that it results in a reduced parasitic capacitance, thus allowing both widebandwidth actuation and detection using a network analyzer as well as signal detection at room temperature. Both in-planeand out of-plane vibrational modes of the nanowire can be driven and the energy difference between the two "states"controlled. The two in plane and out of plane modes can be treated as a classical two level system. We will discuss thepossibility of studying coherent control of such a nanomechanical system following the work of Faust et al.(arXiv:1212.3172v1).

11:30 Molecular Route to Spin Memory Devices Presenter: V RAMAN, KarthikUsing the spin state of a molecule as a quanta of information for storage, sensing and computing has generatedconsiderable interest in building next-generation data storage and communication devices. Extensive research on singlemolecular magnets (SMMs) and molecules with metal ion or nitrogen vacancy as spin carrying centers for storage and forrealizing quantum logic operations have been performed. However in such systems, the strong localization of spin makessuperposition of quantum states a challenging task. In contrast, delocalized carbon based radical species with unpairedspin such as phenalenyl show promise as building blocks for the construction of quantum registers. These phenalenylligands, envisaged as mini-graphene fragment, are formed by the fusion of three benzene rings. The spin structure of thesemolecules respond to external stimuli (such as light, electric and magnetic fields), which provide novel schemes forquantum computing. Here, we construct a molecular device using such molecules as templates to engineer the interfacialspin transfer resulting from hybridization and magnetic exchange interaction with a ferromagnet (FM) surface showing anunexpected interfacial magnetoresistance of over 20% near room temperature. Moreover, we successfully demonstrate theformation of a nanoscale magnetic molecule with a well-defined magnetic hysteresis on FM surfaces. Such independentswitching of the adsorbed magnetic molecule has been unsuccessful with SMMs. These findings suggest the use ofphenalenyl based molecules as an excellent platform for building room temperature molecular-scale quantum spin memoryand processors, opening avenues for developing multifunctional molecular spintronics.


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12:00 Quantum Automata and their Power Presenter: GRUSKA, JozefThe talk will discuss various models of quantum automata and their power, relations among them and also relation to theclassical probabilistic automata. Concentration will be on models that should well simulate small memory quantum devices.



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14:00 Does a quantum particle know its own energy? Presenter: SORKIN, RafaelIf a wave function does not describe microscopic reality then what does? Reformulating quantum mechanics inpath-integral terms leads to a notion of "precluded event" and thence to the proposal that quantal reality differs fromclassical reality in the same way as a set of worldlines differs from a single worldline. One can then ask, for example, whichsets of electron trajectories correspond to a Hydrogen atom in its ground state and how they differ from those of an excitedstate. I will answer the analogous questions for simple model that replaces the electron by a particle hopping (in discretesteps) on a circular lattice.

14:30 Weak Measurement and Sub-Planck Structure Presenter: PANIGRAHI, PrasantaWe investigate the structure of the meter states used for weak measurement and find its connection with sub-Planckstructures present in mesoscopic superposition of classical states. It is observed that the parameter regime wheresub-Planck structure is present in the phase-space, is not conducive for weak measurement. The relevance for QuantumMetrology is pointed out.

15:00 Reading and Manipulating Valley Quantum States in Graphene Presenter: GHOSH, ArindamIn mesoscopic disordered metals, when the sample size is smaller or of the order of the phase coherence length, theelectrical conductance fluctuates with a universal magnitude \sim e^2/h as a function of Fermi energy, magnetic field ordisorder, irrespective of material properties, device geometry or dimensionality. Such "universality" of mesoscopicconductance fluctuations in graphene is however more complex, because of the existence of valleys in graphene.Experimentally, very little is known on the influence of valleys on the mesoscopic fluctuations, although it has beentheoretically suggested that it can become a direct probe to study the valley degeneracy and inter/intra-valley scatteringprocesses. Here we show that the magnitude of mesoscopic conductance fluctuations in graphene increases four timesnear the Dirac point compared to the high density regime, indicating a density dependent crossover from orthogonal tosymplectic universality class. Since the valleys represent a spin-like quantity, it allows the valley degree of freedom to be anew physical resource for a wide variety of applications, ranging from valley-based quantum computation, to valley filters orpolarizers, and in this context our experiments provide a new access to study and exploit valley coherent regime ingraphene.



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16:00 Panel Discussion on the Future of Quantum Computation

Conclusion - Faculty Hall, Main Building (17:00-17:15)

Vote of thanks - Faculty Hall, Main Building (17:00-17:15)

- Presenters: Prof. PATEL, Apoorva



Page 13


Dinner - Guest House Lawns (19:00-20:30)


Page 14


List of Posters

1Ms. ASHOURISHEIKHI, SakinehUniversity of Mysore

Local Unitary equivalent classes of N-qubits mixed Symmetric states

2Ms. BAGCHI, ShrobonaHarish-Chandra Research Institute

Remote state preparation in relativistic scenario

3Dr. BANERJEE, AninditaBose Institute

Recent observations on secure direct quantum communication: Maximally efficient protocols with minimal resources

4Mr. BANERJI, AnindyaWest Bengal University of Technology

Quadrature Uncertainty and Information Entropy of Quantum Elliptical Vortex States

5Dr. BERA, Manabendra NathHarish-Chandra Research Institute

Multisite Entanglement acts as a Better Indicator of Quantum Phase Transitions in Spin Models with Three-spin Interactions

6Mr. CHATTERJEE, SouravIIIT Hyderabad

Correlating Capability of Non Local Hamiltonian

7Dr. COLLINS, DavidColorado Mesa University

Correlated quantum states and enhanced mixed state Pauli channel parameter estimation

8Mr. DEMARIE, TommasoMacquarie University

Topological Entropy with Continuous Variable modes on a 2D Lattice

9Mr. DESHPANDE, AbhishekIIIT Hyderabad

Quantum Correlation Vector: A Unified Approach of Multiparty Quantum Correlation

10Mr. DEY, AmitSaha Institute Of Nuclear Physics

Decoherence in an infinite range Heisenberg model

11Mr. DEY, AnsumanS N Bose National Centre for Basic Sciences

Fine-grained uncertainty relation and biased non-local games in bipartite and tripartite systems

12Ms. DOGRA, ShrutiIISER Mohali

Generation of three qubit generic pure state and their tomographic reconstruction from the two party reduced states using NMR.

13Dr. GOYAL, SandeepThe University of KwaZulu-Natal

Quantum walks in classical systems

14Mr. GUPTA, GyaneshwarDDU Gorakhpur University

Quantum Teleportation of Higher(2nd) Order Optically Polarized State

15Mr. H S, KarthikRaman Research Institute

Can quantum probabilities be retrieved from their moments?

16Ms. HEGDE, SwathiIISER Pune

Engineering Decoherence

17Mr. IEMINI, FernandoUniversidade Federal de Minas Gerais

Quantum Correlations Measures in Systems of Indistinguishable Particles

18Mr. JASEEM, Noufal IISER Thiruvananthapuram

The best initial state for a quantum limited measurement

19Ms. JOSE, SaliniIISER Thiruvananthapuram

Quantum Enhanced Measurements using Bose Einstein Condensates

20Mr. J, Prabhu TejBangalore University

Quantum reading of digital memory with non-Gaussian entangled light

21Mr. K P, NagarjunCQIQC, IISc

Lyapunov Control of Quantum Systems with Applications to Quantum Computing

22Mr. KAMINENI, Rama Koteswara RaoIndian Institute of Science

Monogamy of quantum correlations reveals frustration in quantum spin models: Experimental demonstration in NMR

23Mr. KATIYAR, HemantIISER Pune

Quantum Correlations: Evolution, Stability and Entropic Leggett-Garg Inequality

24Ms. K, SaliniIISER Thiruvananthapuram

All Multiparty Quantum States Can Be Made Monogamous

25Dr. KULKARNI, ManasPrinceton University

Dynamics of Large Quantum Systems: Equilibration, Thermalization and Interactions.

26Mr. KUMAR, SantoshJawaharlal Nehru University

Controllable quantum gates in a fiber coupled atom-cavity system

27Ms. LEE, SeunghyunRaman Research Institute

Atom-ion and molecule-ion physics of ions.

28Mr. MACIEL, ThiagoUniversidade Federal de Minas Gerais

Analects on quantum tomographies and inference schemes

29Mr. MAL, ShiladityaS N Bose National Centre for Basic Sciences

Detecting mixedness of qutrit systems using the uncertainty principle

30Dr. MISHRA, Devendra KumarV S Mehta College of Science

Unambiguous discrimination of two squeezed states using probabilistic quantum cloning

31Mr. MISHRA, UtkarshHarish-Chandra Research Institute

Macroscopic Schrodinger Cat Resistant to Particle Loss and Local Decoherence

32Mr. MISRA, AvijitHarish-Chandra Research Institute

Correlating capability of non-local Hamiltonians

33Mr. MURALEEDHARAN, GopikrishnanIISER Thiruvananthapuram

DQC1 as a concordant computation

34Dr. NARAYANAN, AndalRaman Research Institute

Heat bath effects on the violation of Leggett-Garg Inequalities

35Mr. PRAMANIK, TanumoyS N Bose National Centre for Basic Sciences

Fine-grained uncertainty relation and nonlocality of tripartite systems

36Dr. QURESHI, TabishJamia Millia Islamia

Quantum Twist to Complementarity

37Dr. RAI, AmitCQT, National University of Singapore

Dynamics of nonclassical light in integrated nonlinear waveguide arrays and generation of robust continuous-variable entanglement

38Mr. RAI, Ashutosh S N Bose National Center for Basic Sciences

Local simulation of singlet statistics for restricted set of measurement

39Mr. ROY BARDHAN, BhaskarLouisiana State University

Quantum Dynamical Decoupling to Enhance Spin Squeezing in a Dephasing Bath

40Dr. R, PrabhuHarish-Chandra Research Institute

Exclusion principle for multi-port quantum dense coding: qualitative and quantitative aspects

41Mr. S K, SazimInstitute of Physics

A Study of Teleportation and Super Dense Coding capacity in Remote Entanglement Distribution

42Dr. S V M, SatyanarayanaPondicherry University

A new two qubit mixed state for teleportation with improved fidelity

43Prof. SAMUEL, JosephRaman Research Institute

Controlling Entanglement using the Geometric Phase

44Dr. SARVEPALLI, PradeepIndian Institute of Technology Madras

Topological subsystem codes from hypergraphs

45Mr. SAWANT, RahulRaman Reserach Institute

Quantifying Multi-Path Effects in Three-Slit Interference

46Mr. SENGUPTA, RitabrataIISER Mohali

Generating new entanglement witnesses by composition of extermal positive but not completely maps with n-super-positive maps

47Dr. SHAJI, AnilIISER Thiruvananthapuram

On the role of non classical correlations in quantum computational speed up

48Ms. SHENOY, AkshataIndian Institute of Science

Device-independent quantum information splitting

49Mr. SHUKLA, AbhishekIISER Pune

Simulating Interaction-Free Measurements and Noise-Spectroscopy by NMR

50Ms. SHUKLA, ChitraJaypee Institute of Information Technology

Hierarchical quantum information splitting using 4-qubit entangled states

51Mr. SOORAT, Ram University of Hyderabad

Polarization Shift Keying for free space QKD: Effect of noise on reliability of the QKD protocols

52Mr. SRIKRISHNA, Omkar SPoornaprajna Institute of Scientific Research

The operator sum-difference representation for the two-qubit amplitude damping channel

53Mrs. V K O, YashodammaKuvempu University

Is composite noise necessary for sudden death of entanglement?

54Mr. V S, ManuIndian Institute of Science

Quantum Simulation of Dzyaloshinsky-Moriya Interaction

55Mr. VANARASA, ChiranjeeviIIIT Hyderabad

Fault tolerant establishment of Entanglement in arbitrary Quantum Networks

56Dr. VINJANAMPATHY, SaiCQT, National University of Singapore

Quantum Steering as a Quantum Game

57Mr. XIA, BichangCity University of Hong Kong

Relative entropy of quantum entangled state

58Mr. YESHWANTH, SunilUniversity of Southern California

Equilibration times in clean and noisy systems

Xpressions

This is an introduction to the two star artistes who will be collaborating on the 10 th of January 2013 at the International Conference on Quantum Information and Quantum Computing at the Indian Institute of Science, Bangalore. Dr. Jayanthi Kumaresh on the Veena and the danseuse Smt.Priyadarsini Govind. Both these artistes are very renowned in their respective fields of classical music and dance. This collaboration is special and is expected to bring out synergies of expressions and creativity.

Dr. Jayanthi Kumaresh has been enthralling audiences the world over with her graceful, emotive and expressive music for the last 25 years. The Statesman, a well acclaimed daily quotes that Jayanthi is "The best and most versatile Veena artiste we have today."

Born into a family where music has been the mainstay for the last seven generations, Jayanthi started playing the Veena when she was barely 3. Winning her way through several laurels and awards right from her childhood, Jayanthi was soon one of the youngest artistes in Veena to receive the A-TOP grading from the All India Radio (the highest grade offered by the only grading body in India). In recognition of her artistry, the Government of Tamilnadu has honoured her with the title of Kalaimamani. She has also been the recipient of prestigious awards like the 'Best Main Musician', 'Best Veena concert of the year', 'Sathyashree', 'Veena Nada Mani' and the like.

Jayanthi has been invited by prestigious organisations across the world like the Theatre de la Ville in Paris, the UN and the World Music Centre in New York, the Music Guimet in Paris, the Woodstock in United States, the Indo-German Societies, the Indian embassy at Sharjah and several such platforms to represent the National instrument of India – the Saraswathi Veena. Jayanthi has performed in USA, UK, Australia, New Zealand, Singapore, Malaysia, Mauritius, Luxembourg, Canada, Germany, France, Netherlands, Norway, Switzerland to name a few.

Jayanthi has recorded several CDs for companies all over the world like Times Music, Music Today, Sense World, Earthsync, Navras, Home Records etc. Jayanthi was awarded a Doctorate by the University of Mysore for her work on the subject "Analytical study of different Banis and playing techniques of the Saraswathi Veena".

She will be accompanied by Sri Jayachandra Rao on the Mridangam and Sri Pramath Kiran on Morching and Percussion.

Smt. Priyadarsini Govind is today one of the foremost exponents of the Bharatanatyam in India today. For Priyadarsini Govind, Bharatanatyam has been her first love ever since she was six. After initial grooming, Priyadarsini specialized in abhinaya under 'Padma Bhushan' Smt. Kalanidhi Narayanan from the age of nine. Priyadarsini received advanced training in Bharatanatyam under Guru Swamimalai K. Rajaratnam, exponent of the Vazhvoor School from the age of ten. Priyadarsini imbibes the best of both her teachers. Priyadarsini has been giving recitals from the age of sixteen, and has performed in numerous prestigious academies in India and abroad.

This Chennai based dancer is a delight to watch, selected to dance at the prestigious Festival of India in Paris, in 1985 at the age of 20, Priyadarsini had several occasions after that to showcase her artistry---the Swarna Samaroh, celebrating 50 years of Indian Independence organized by the Sangeet Natak Academy, the Khajuraho Dance Festival and the like. Priyadarsini also holds the title of 'Kalaimamani' awarded by the Government of Tamil Nadu in 1998, an award given for artistic excellence.

Priyadarsini has performed extensively in Europe, besides in countries like the USA, Tunisia, South Africa and even Afghanistan, under the ICCR banner and on invitation by the French Government at the Parc de Villette Festival in Paris.

Registered Participants

1 Prof. ACHANTA, Venu [email protected]

Tata Institute of Fundamental ResearchMumbai, INDIA

2 Prof. AGARWAL, [email protected]

Oklahoma State UniversityStillwater, UNITED STATES OF AMERICA

3 Mr. AJOY, [email protected]

Massachusetts Institute of TechnologyCambridge, UNITED STATES OF AMERICA

4 Prof. ARVIND, [email protected]

IISER MohaliMohali, INDIA

5 Ms. ASHOURISHEIKHI, [email protected]

University of MysoreMysore, INDIA

6 Ms. BAGCHI, [email protected]

Harish-Chandra Research InstituteAllahabad, INDIA

7 Dr. BANDYOPADHYAY, [email protected]

BITS-Pilani, Pilani CampusPilani, INDIA

8 Dr. BANERJEE, [email protected]

Bose InstituteKolkata, INDIA

9 Mr. BANERJI, [email protected]

West Bengal University of TechnologyHooghly, INDIA

10 Dr. BERA, Manabendra [email protected]


11 Prof. BRASSARD, [email protected]

University of MontrealMontreal, CANADA

12 Mr. CHATTERJEE, [email protected]

IIIT HyderabadHyderabad, INDIA

13 Prof. CHATURVEDI, [email protected]

University of HyderabadHyderabad, INDIA

14 Dr. COLLINS, [email protected]

Colorado Mesa UniversityGrand Junction, Colorado, UNITED STATES OF AMERICA

15 Mr. DAS, [email protected]


16 Mr. DEMARIE, [email protected]

Macquarie UniversitySydney, AUSTRALIA

17 Dr. DESHMUKH, [email protected]


18 Mr. DESHPANDE, [email protected]


19 Mr. DEY, [email protected]

Saha Institute Of Nuclear PhysicsKolkata, INDIA

20 Mr. DEY, [email protected]

S N Bose National Centre for Basic SciencesKolkata, INDIA

21 Ms. DOGRA, [email protected]


22 Dr. DU, [email protected]

University of Science and Technology of ChinaHefei, CHINA

23 Dr. DUTTON, [email protected]

Raytheon BBN TechnologiesArlington, UNITED STATES OF AMERICA

24 Prof. GHOSH, [email protected]

Indian Institute of ScienceBangalore, INDIA

25 Dr. GOYAL, [email protected]

The University of KwaZulu-NatalDurban, SOUTH AFRICA

26 Prof. GRUSKA, [email protected]

Masaryk UniversityBrno, CZECH REPUBLIC

27 Mr. GUDAPATI, Naresh [email protected]

CQIQC, IIScBangalore, INDIA

28 Mr. GUPTA, [email protected]

DDU Gorakhpur UniversityGorakhpur, INDIA

29 Mr. H S, [email protected]

Raman Research InstituteBangalore, INDIA

30 Mr. HEGDE, [email protected]

University of MysoreMysore, INDIA

31 Ms. HEGDE, [email protected]

IISER PunePune, INDIA

32 Mr. IEMINI, [email protected]

Universidade Federal de Minas GeraisBelo Horizonte, BRAZIL

33 Mr. JASEEM, Noufal [email protected]

IISER ThiruvananthapuramThiruvananthapuram , INDIA

34 Prof. JENNEWEIN, [email protected]

IQC, University of WaterlooWaterloo, CANADA

35 Prof. JOAG, [email protected]

University of PunePune, INDIA

36 Ms. JOSE, [email protected]

IISER ThiruvananthapuramThiruvananthapuram, INDIA

37 Mr. J, Prabhu [email protected]

Bangalore UniversityBangalore, INDIA

38 Mr. K P, [email protected]


39 Prof. K V, [email protected]


40 Mr. KAMINENI, Rama Koteswara [email protected]


41 Mr. KATIYAR, [email protected]


42 Prof. KIM, [email protected]

Korea Institute for Advanced StudySeoul, REPUBLIC OF KOREA

43 Prof. KOREPIN, [email protected]

YITP, Stony Brook UniversityStony Brook, UNITED STATES OF AMERICA

44 Dr. KOTA, [email protected]

IBM India Research LaboratoryBangalore, INDIA

45 Ms. K, [email protected]


46 Dr. KULKARNI, [email protected]

Princeton UniversityPrinceton, UNITED STATES OF AMERICA

47 Mr. KUMAR, [email protected]

SamsungBangalore ., INDIA

48 Prof. KUMAR, [email protected]


49 Mr. KUMAR, [email protected]

Jawaharlal Nehru UniversityDelhi, INDIA

50 Ms. KUNDU, [email protected]

Chennai Mathematical InstituteChennai, INDIA

51 Prof. LAFLAMME, [email protected]

IQC, University of WaterlooWaterloo, CANADA

52 Ms. LEE, [email protected]


53 Prof. LEWENSTEIN, [email protected]

ICFO---Institute of Photonic SciencesCastelldefels (Barcelona), SPAIN

54 Prof. LYON, [email protected]

Princeton UniversityPrinceton, UNITED STATES OF AMERICA

55 Mr. MACIEL, [email protected]

Universidade Federal de Minas GeraisBelo Horizonte, BRAZIL

56 Prof. MAJUMDAR, Archan [email protected]


57 Mr. MAL, [email protected]


58 Dr. MANDAYAM, [email protected]

Institute of Mathematical SciencesChennai, INDIA

59 Dr. MISHRA, Devendra [email protected]

V S Mehta College of ScienceAllahabad, INDIA

60 Mr. MISHRA, [email protected]


61 Mr. MISRA, [email protected]


62 Prof. MOODERA, [email protected]

Massachusetts Institute of TechnologyCambridge, UNITED STATES OF AMERICA

63 Dr. MUKERJEE, [email protected]


64 Mr. MURALEEDHARAN, [email protected]


65 Prof. N D, Hari [email protected]

Chennai Mathematical InstituteChennai, INDIA

66 Dr. NARAYANAN, [email protected]


67 Prof. NATARAJAN, [email protected]


68 Prof. NAYAK, [email protected]

University of WaterlooWaterloo, CANADA

69 Prof. N, [email protected]

Indian Academy of SciencesBangalore, INDIA

70 Prof. P S, Anil [email protected]


71 Prof. PAI, [email protected]

Goa UniversityPanaji, INDIA

72 Prof. PANDIT, [email protected]


73 Prof. PANIGRAHI, [email protected]

IISER KolkataKolkata, INDIA

74 Prof. PATEL, [email protected]


75 Prof. PATI, [email protected]


76 Mr. PRAMANIK, [email protected]


77 Dr. QURESHI, [email protected]

Jamia Millia IslamiaNew Delhi, INDIA

78 Dr. RAI, [email protected]

CQT, National University of SingaporeSINGAPORE

79 Mr. RAI, Ashutosh [email protected]

S N Bose National Center for Basic SciencesKolkata, INDIA

80 Mr. RAY, [email protected]


81 Mr. ROY BARDHAN, [email protected]

Louisiana State UniversityBaton Rouge, UNITED STATES OF AMERICA

82 Dr. R, [email protected]


83 Mr. S K, [email protected]

Institute of PhysicsBhubaneswar, INDIA

84 Dr. S V M, [email protected]

Pondicherry UniversityPuducherry, INDIA

85 Mr. SAMANTARAY, [email protected]

Physical Research LaboratoryAhmedabad, INDIA

86 Prof. SAMUEL, [email protected]


87 Prof. SANDERS, [email protected]

University of CalgaryCalgary, CANADA

88 Mr. SARANGI, Pratik [email protected]


89 Dr. SARVEPALLI, [email protected]

Indian Institute of Technology MadrasChennai, INDIA

90 Mr. SAWANT, [email protected]

Raman Reserach InstituteBangalore, INDIA

91 Dr. SEN DE, [email protected]


92 Prof. SEN, [email protected]


93 Mr. SENGUPTA, [email protected]


94 Dr. SEN, [email protected]


95 Dr. SHAJI, [email protected]


96 Ms. SHENOY, [email protected]


97 Mr. SHUKLA, [email protected]


98 Ms. SHUKLA, [email protected]

Jaypee Institute of Information TechnologyNoida, INDIA

99 Prof. SIMON, [email protected]

Institute of Mathematical SciencesChennai, INDIA

100 Prof. SINHA, [email protected]


101 Dr. SINHA, [email protected]

Raman Research InstituteBengaluru, INDIA

102 Mr. SOORAT, Ram [email protected]


103 Prof. SORKIN, [email protected]

Perimeter Institute for Theoretical PhysicsWaterloo, CANADA

104 Mr. SRIKRISHNA, Omkar [email protected]

Poornaprajna Institute of Scientific ResearchBangalore, INDIA

105 Mr. SRINIVASAMURTHY, [email protected]

Poornaprajna Institute of Scientific researchBangalore, INDIA

106 Prof. SUDARSHAN, E C [email protected]

University of Texas at AustinAustin, UNITED STATES OF AMERICA

107 Dr. [email protected]

Kuvempu UniversityShimoga, INDIA

108 Dr. SVERDLOV, [email protected]


109 Dr. T S, [email protected]


110 Mr. THOMAS, [email protected]


111 Dr. V RAMAN, [email protected]

IBM India Research LaboratoryBangalore, INDIA

112 Mr. V S, [email protected]


113 Ms. V, Anjani [email protected]


114 Mr. VANARASA, [email protected]


115 Dr. VIJAYARAGHAVAN, [email protected]


116 Mrs. V K O, [email protected]

Kuvempu UniversityShimoga, INDIA

117 Dr. VINJANAMPATHY, [email protected]

CQT, National University of SingaporeSINGAPORE

118 Mr. V, [email protected]

CQIQC, IIScBengalooru, INDIA

119 Dr. VUDAYAGIRI, [email protected]


120 Prof. WEIHS, [email protected]

University of InnsbruckInnsbruck, AUSTRIA

121 Mr. XIA, [email protected]

City University of Hong KongHong Kong , CHINA

122 Prof. YAMAMOTO, [email protected]

National Institute of InformaticsTokyo, JAPAN

123 Mr. YESHWANTH, [email protected]

University of Southern CaliforniaLos Angeles, UNITED STATES OF AMERICA

124 Prof. YUSA, [email protected]

Tohoku UniversitySendai, JAPAN

Corporate Participants

● Dr. B. S. Adiga● Dr. M. Girish Chandra● Dr. Praveen Gauravaram● Dr. M. A. Rajan

● Mr. N. R. P. Kumar● Mr. Vedha Muthu

● Dr. Pandurangaiah

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