atoms, quanta, and qubits: atomism in quantum mechanics and information
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Atoms, quanta, and qubits:
Atomism in quantum mechanics and
information
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Vasil Penchev
Bulgarian Academy of Sciences:Institute for the Study of Societies of
Knowledge
Monday, November 3rdFaculty of Sciences of the University of Lisbon
The international colloquium Atomism and
Imagery (from the 20th century onwards)
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Atomism in original
The original conception of atomism suggests thatthe process of dividing the matter has a limit:the atoms, which cannot be divided more intocomposing parts
The matter itself is defined in turnas what consists of atoms
The initial concept originates from Leucippus and
Democritus, and perhaps earlier. The etymologyof atom, or , indivisible,uncutable, non-cutable, from - ("not") and("I cut") is Ancient Greek
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A few main properties of Leucippus
and Democritus atom:
Nothing else real than atoms and voids Atoms are indivisible and unchangeable
The atoms distinguish from each other in form
Anything in the world is composed by atoms
All things differ from each other in the combination
of atoms
In fact, Leucippus and Democritus concept of atom
is closer to the contemporary notion of atom in
chemistry than in physics
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John Daltons atom
John Dalton (1803), a chemist, was who revived theancient philosophical concept of atom foran experimental science such as chemistry
According to his conception:
The atom is the least unit of any chemical elementdefined by its mass
The atoms cannot be decomposed, neither created
They are identical: All chemical reactions are onlysome recombinations of atoms
In other words, the atoms are granted as the units
of chemical matter
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British physicist
and chemist
John Dalton(1766-1844)
by Charles Turner
(1773-1857)after
James Lonsdale
(1777-1839)
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Matter and motion:
atoms and infinitesimals
The differentials of Leibniz and Newton
rigorously reinterpreted in Robinsons
nonstandard analysis (1966) can be thought as
a kind of infinitely tiny atoms of physical
motion
However, the discovery of quanta and the
fundamental Planck constant in the beginningof the XX century needed different
conceptions about the atomism and unity of
matter and motion in physics
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The view of classical physics
Matter Motion
Atoms
Infinitesimals
The bridge of
energy accordingto relativity
The infinitely small
atoms of motion
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Atomism and the concept of atom
in physics
The name atom in physics is reserved for
entities, which can be divided into electrons,
protons, neutrons and into some of the rest
elementary particles, some of which are
in turn compounded by other, still more
elementary ones
Even more, those ostensibly elementaryparticles turn out to be too much to be able
to be really elementary: more than hundreds
or even more than thousands
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.edu/~js/i
mages/
at
om.jpg
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The atoms of physical matter
As the matter should be single, the atoms ofchemical matter were granted also as those of
physical one
However about a century later, the atoms weredecomposed into electrons, protons, photons, etc.
Even before that, the physical motion unlike any
chemical reaction could not be ever represented as
some recombinations of atoms
All atoms are discrete, but all physical motion
are continuous and even smooth after Newton
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http://www.wikihow.com/images/e/eb/Find-
the-Number-of-Protons%2C-Neutrons%2C-and-Electrons-Ste -1.
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Neutrons%2C-and-Electrons-Step-2.jpg
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The Standard model
After the Higgs boson has confirmed
experimentally in the mid of 2012,
the Standard model consisting of 6 quarks,
6 leptons, and 13 bosons was ultimately
corroborated
Just these can form all elementary
particles are the fundamental and
indivisible atoms both of physical matterand physical motion according to
the Standard model
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More about the Standard model
The fermions in it (the quarks and leptons) canbe interpreted as the atoms of matter, andthe bosons (the 8 gluons, photon,
2W-bosons, and Z-boson), as the atoms ofmotion
The Higgs boson describes the relationbetween the two groups in a sense andtherefore, how mass at rest can arise(or motion to be transformed in matter)
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http://upload.wikimedia.org/wikipedia/commons/thumb/0/0
0/Standard_Model_of_Elementary_Particles.svg/819px-Standard_Model_of_Elementary_Particles.svg.png
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A few rather big dark clouds on
the horizon of the Standard model
Kelvins (1900) metaphor about a few littleclouds on the horizon of the classical physicscan be reinterpreted about the Standard
model: These clouds are rather dark andentangled, though:
Dark matter
Dark energy Entanglement
Gravity
General relativity
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Dark
matter
Darkenergy
Entanglement
Gravity
General
relativity
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Dark matter
Trimble (1987) demonstrated that the masscalculated by gravitational effects andthe mass calculated by radiation differconsiderably from each other
An immense part of the mass in the universeshould not emit any radiation therefore beingnamely dark matter
Only the neutrinos could be that dark matteraccording to the Standard model Plank 2013 results estimate the dark matter
to be over 5 times more than the visible one
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http://hetde
x.org/ima
ges/
da
rk_
energy
/particle_
zoo.jpg
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The dark matter versus the Standard model
The mass at rest of the neutrinos is almost zero:So the ascription of more than 5/6 of the mass ofthe universe to them is not convincing enough
If the Standard model does not describe all kinds
of matter, the unknown ones would behavior asthat dark matter
Indeed gravity and thus the gravitational mass,
which are described by general relativity, arebeyond the Standard model: Therefore theysupply an independent evidence, which is rathernot in favor of the Standard model, though
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The visible masThe dark mass
The dark energy withzero mass at rest
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Dark energy Two collectives (1998, 1999) demonstrated that
theexpansion of the universe accelerates This can be explained by dark energy, which should
be 68.3% from the energy in the universe accordingto the Plank 2013 results: The rest belongs to
the bright and dark matter Any energy, which is not any matter with nonzero
mass at rest, can be hardly dark according to
the Standard model: That energy should be visible for the gluons and
photon are only stable bosons. Free gluons arealmost impossible because of the phenomena of
confinement, and the photons are visible
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http://scienceblogs.com/startswithabang/files/2013/03/url.gif
h d k
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The dark energy versus
the Standard model
The dark matter is only not convincinglyenough explainable in the framework of
the Standard model
Unlike it, the dark energy is absolutelyunexplainable within it: no any particle with zero
mass at rest, to which the phenomenon of dark
energy might be due
As dark matter as dark energy becomes visible
only by astrophysical observations interpreted as
usual in terms of general relativity
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Entanglement The entanglement was theoretically forecast in
thefamous paper of Einstein, Podolsky, and Rosen(1935)
Schrdinger (1935) also forecast the phenomena ofentanglement called by him verschrnkte
Zustnde
Both papers deduced the phenomena ofentanglement from the mathematical base of
quantum mechanics, namely from the properties ofHilbert space
However, the former three demonstrated theforecast phenomenon as the proof of the allegedincompleteness of quantum mechanics
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Anal
ternative
choic
ebetween
them
easurementof:
Th
isleadsto
two
differentstatesof
thesyst
emI
I:
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The experimental confirmation of
entanglement
John Bell (1964) deduced a sufficientcondition as an experimentally verifiablecriterion in order to distinguish classical from
quantum correlation (entanglement)
Aspect, Grangier, and Roger (1981, 1982)confirmed experimentally the existence of
quantum correlations exceeding the upperlimit of any possible classical correlations
All other experiments until now confirmcategorically the phenomena of entanglement
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http://upload.wikimedia.org/wikipedia/commons/1/1e/Bell-test-photon-analyer.png
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The entanglement versus
the Standard model
The Standard model is linear in principle as far asit is based on Hilbert space and its linear
transformations
Moreover, the Standard model is closed for itcannot be the linear part or approximation of
some future non-linear generalization
Particularly, it cannot incorporate any additionalsymmetry as that would violate its linearity
The Standard model is ultimate knowledge
in a sense and even thus necessarily incomplete
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Linear
Symmetries of
a single Hilbert space:
[U(1)]X[SU(2)]X[SU(3)]
Only symmetries equivalentto the wave-particle image
of an inertial reference frame
Description by
two or more
Hilbert spaces:
Nonlinear
Equivalents tothe wave-particle
image of an arbitrary
reference frame
Gravity
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Gravity Gravity is the only physical force (or interaction),
which remains unexplained by any experimentallyconfirmed theory in the framework of the Standardmodel
Even more, any theory of gravity consistent with
quantum mechanics, i.e. any theory of quantumgravity consistent with all relevant experimentsdoes not exist
However, the hypothesis that quantum gravitycannot exist even as a law of nature would meanthat quantum theory and quantum mechanicsparticularly are not universal doctrines about
nature
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Electromagnetic
interaction
Weak interaction
Strong interaction
The Standard model
Does gravity allowany relevantquantum model at all?
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The gravity versus the Standard model
Gravity is a physical interaction, obviously,
but it is not a part of the Standard model
Even more, it cannot be any part of the Standard
model because it is not and cannot be local and
thus linear in the sense of the Standard model
Even still more, the Standard model itself does not
allow of any room in it at where gravity would stay:
The Standard model is already closed: No rooms!
That closedness originates immediately from
its linearity and thus from the fundamental locality
of all gauge theories
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General relativity
General relativity might be called the Standard
model of gravity
Unfortunately, it seems to be not only non-
quantum in principle but even not allowing of any
consistent quantum generalization of it Furthermore, it supplies the interpretational
framework, in which all existing experimental
results against the Standard model such as the darkmatter and energy can survive
General relativity is the only bastion of theoretical
resistance against quantum mechanics
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Dark matter
and energy
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N i i t
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Non!
Linear Nonlinear
Gaugeable Nongaugeable
Local in space-time Nonlocalin space-time
Invariant to choiceNon-invariant
to choice
A f li i l i
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A few preliminary conclusionsabout atomism in physics
Concerning the divisibility of the physicalatom
Concerning the relation of the concepts of
atoms and elementary particles Concerning the indivisibility of the Plank
constant
Concerning the fundamental problem ofquantum mechanics
Concerning the probabilistic interpretation of
quantum mechanics
E d i
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Units of matter
Matter and motion
independent
of each other
Energy and time
independent
of each other
Units of action
Action unifies
matter and motion
The fundamental
Plank constant
Action unifies
energy and time
No any fundamental
constant
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The divisibility of the physical atom
Even more, there is no physical principle, which canunderlie the alleged indivisibility or atomicity of
the atom itself
The atom can be considered as elementary only in
relation to all chemical properties, but not at all as
to the physical ones such as mass, energy, charge,
momentum, trajectory, and other
The ostensibly indivisible atom turns out to be very
complex composite system consisting of other
elementary particles such as protons, neutrons,
electrons, gluons, quarks and still more others
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http://www.ep.ph.bham.ac.uk/general/outr
each/SparkChamber/img/fundamental.gif
Atoms and elementary particles
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Atoms and elementary particlesThe atoms and all elementary particles are pieces ofmass or energy, which has to be conserved in closedsystems according to the law of its conservation,but there is not any limit of its divisibility
The revolution in physics made by quantum mecha-
nics introduced the Plank constant as the fundamentallimit of divisibility of one physical quantity, action
Thus it managed to discover something, which is
indivisible according to the laws of nature and evenguaranteed by a fundamental constant, the Plank one
Even more, physics and science have not managed tofind until now nothing else also as fundamentally
indivisible as the quantum of action
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http://abyss.uoregon.edu/
~js/images/scale.gif
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The indivisibility of the Plank constant
Quantum mechanics is grounded ontheactually indivisible quanta of actionlimited by the fundamental Planck constant
Any other indivisibility in physics originates
from the quantum of action
The meaning of that quant is so grandiose forknowledge of mankind that quantum is
a synonym of modern or contemporaryand antonym of classical: e.g. quantumversus classical physics and even classicalversus quantum science
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What implies the existing of the indivisible
constant of action (but not its value):
Th f d t l bl f t
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The fundamental problem of quantum
mechanics
Quantum mechanics resolves the problem ofhow both discrete and continuous (evensmooth) to be described uniformly and
invariantly The quantum of action is what forced
thephysicists to generalize the description intheabove way particularly to unify the
quantum leaps and the smooth motions ofclassicalphysics including even those studiedby special and general relativity
The temporal interpretation of the definition
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The temporal interpretation of the definition
of physical quantity (A)in quantum mechanics
*(x) (x)
About the probabilistic interpretation
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About the probabilistic interpretationof quantum mechanics
Max Born (1926) demonstrated that the solutionunifying discrete and smooth motion at the sametime unifies the description of probable and actualstates of quantum systems
Just this is the sense of the so-called probabilisticinterpretation of quantum mechanics
The fermions (having semi-integral spin) can be
referred to the actual and therefore well-orderedstate
The bosons (having integer spin) should describe
the possible and unorderable coherent state
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A necessary elucidation of the connection
between probabilistic mathematical) and
mechanical physical) approach
Totality aka eternity aka infinity
No axiom of choice (the Paradise)
Both
needchoice
(axiom)
Probabilistic (mathematical) approach
Mechanical (physical) approach
Minkowski space:from the Earthto the Paradise
by the stairsof time
Hilbert space:from the Paradise
to the Earth by the stairs
of energy
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Hilb T i
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Hilbert space as a quantum Turing tape
Hilbert space can be represented in a few ways,one of which is that of quantum information as
a tape of qubits instead of bits and processed by
a quantum computer (quantum Turing machine)
instead of a usual computer (standard Turing
machine)
Thus Hilbert space furthermore allows of any
physical process to be interpreted as
computational or informational, and the universe
itself, as an omnipresent quantum computer
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h b b
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Both bit and qubit
As a bit is the unit of classical information, asa qubit is the unit of quantum information
Qubit is: |0 |1where , are twocomplex numbers such that 2+ 2 = 1, and
|0, |1are any two orthonormal vectors (e.g. theorthonormal bases of any two subspaces) in anyvector space (e.g. Hilbert space, Euclidean space,etc.)
Both bit and qubit share some choice, which isbetween two alternatives for the former andamong an infinite set for latter
One bit (a finite choice)
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0
1
0
1
One bit(afinitechoice)
One qubit (an infinite choice)
Choice Well-ordering
Q bit th i fi it li ti f bit
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Qubit as the infinite generalization of bit
The qubit can be realized as a kind of
generalization of a bit as to infinite sets ofalternatives in a choice instead of the twoequiprobable alternatives in a choicedetermining a bit of information
Consequently, the quantity of quantuminformation measured in units of qubits canbe interpreted as the generalization of
the quantity of classical information measuredin units of bits
Thus, the quantity of information whetherclassical or quantum is the quantity of choices
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Finite sets Infinite sets
Classical
information
Quantum
information
Th i di i ibilit b th f bit d f bit
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The indivisibility both of a bit and of a qubit
Both a bit and a qubit are indivisible units
Therefor they can be called atoms of informationeither classical or quantum
The indivisibility or atomicity of choiceunderstood philosophically or mathematicallyunderlies both
The choice can be well understood as an atom of
time for the choice is the only which can transformfuture into past by means of the choice ofthe present
So the choice is an atom of time
I f ti A choice
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Much Many
Information A choice
Finite
(binary)
Infinite
A cell Values
0
1
...
... ...
Turing tapes = well orderings:
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Wave function in terms of qubits
Any wave function or any state of a physicalsystem can be represented as a correspondingseries of those indivisible qubits or atoms ofquantum information
Indeed any physical system should bequantum according to quantum mechanics
Hilbert space can be also considered as
thefree variable of quantum information Then any wave function is a value of
that variable as what the Hilbert spacehas been considered
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1 n n
Little transfinite ordinals
Bits Qubits
1 n
The mostentangledqubit
Entanglement
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Entanglement
Even more, wave functions can interact to each
other immediately, by entanglement In fact, the entanglement cannot violate the
indivisibility of the atoms of quantum
information, that is the qubits constitutingany wave functions
Entanglement is defined as a state of a compositequantum system, when its Hilbert space cannot be
factorized as any tensor product of the Hilbertspaces of the subsystems
Nevertheless, the entanglement does not shatter
the qubits into any parts
Classical correlations
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Quantum system 1Quantum system 2
The violation of Bells inequalities:
The imagery of atomism in physics
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The imagery of atomism in physics The comparison of atoms, quanta, and qubits
demonstrates certain imagery of atomism inmodern physics: from atoms of matter (or energy)via atoms (quanta) of action to atoms (qubits)of quantum information
That series of images of atoms can be understoodas the direction of a generalization from the atomsof matter by itself to quanta shared both by theparticles of matter (the fermions in the Standard
model) and the particles of motion andinteraction (i.e. the bosons there)
Consequently, the concept of quanta is more
fundamental than that of atoms
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Atomism and the cognition of reality
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Atomism and the cognition of reality
The transformation from atoms to quanta is
a conceptual shift in the cognition of reality Reality cannot be understood more as some base
of matter, which is in continuous motion
The atoms cannot refer only to that base ofmatter neither continuity only to the motion ofmatter
Time is what unifies matter and motion bythe choice as a special kinds of temporal atom
The cognition of reality is gradually redirected toquanta, information, choice, and time in final
analysis
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The choice as a kind of temporal atom
Present
Past
The Standard model in terms of
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The Standard model in terms of
quantum information
The number of particles (about fifty togetherwith the antiparticles) though exactly limitedseems to be too big to be willingly accepted for
kinds of atoms They call for some underlying and unifying
principle in turn
The so-called traditionally elementary particlesare rather mathematical than physical entities
Accordingly, their nature should be ratherinformational than only physical or even only
mathematical
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http://www.quantumdiaries.org/wp-
content/uploads/2014/03/SUSY-diagram-
Particle-Fever1.png
The Standard model as the quantum
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q
description a privileged reference frame
The Standard model can be associated with justone privileged reference frame
It should be inertial for both Standard model and
quantum mechanics are necessarily linear It is identified as that of the Big Bang
One can use the metaphor of the following
equation: It equates the nonlinearity of generalrelativity to the linearity of Hilbert space
That equation would have the singularity of the
beginning, i.e. the Bing Bang as the only solution
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The equation
The Big Bang as the solving
of that equation
The Big Bang satisfiesthe equating of the linearity of
the Standard model to
the nonlinearity
of general relativity
Relativity and a privileged position
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y p g p Special relativity arose in fighting against
the absolute reference frame of the alleged
ether and thus against any privileged referenceframe
However Einstein himself declared (1920) that
general relativity unlike special one is consistentboth to the availability and lack of some privilegedreference frame(s)
So the dethroned ether can be restored as togeneral relativity according to him
Thus the Standard model can be seen asthe quantum doctrine on the restored ether and
reference frame linked to it
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Special relativity
General relativity
Quantum mechanics
The Standard model
The absolutereference frameof classical mechanics
Ether
Revolution and Restauration
of the privileged position in physics
The privileged reference frame of
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the Big Bang
The Standard model needs only a privilegedreference frame, which can be only inertial becauseof its linearity
However the Bing Bang requires furthermore still
another condition ostensibly self-obvious:
All physical laws and thus including the Standardmodel itself should be invariant to any reference
frame: This implies the beginning (i.e. the Big Bang) as
the only possible general reference frame asthe only one common to all in the universe
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The equations of the Big Bang
The Big Bang
A privileged
referenceframe
Universality of
the physical laws
+
=
The Big Bang =The Standard
model
Universality of
the Standard model
+
Other interpretations of the privileged
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reference frame However if the Standard model is allowed to be not
so general and valid to any reference frame, other
options appear, too:
For example ,one can suggest that inertial reference
frame linkable to the present position of the earth
to the universe as that privileged by the Standard
model
Then, all different enough reference frames inthe universe would generate a proper Standard
model relevant to each corresponding position to
the universe
One and many standard models
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Oneinertialreference
frame Wave-
particleduality
Onestandardmodel
The inertialreference
frame of
the Big Bang
Our Standard
model
Anyinertial
referenceframe Wave-
particle
duality
Some one
standardmodel
The privileged inertial reference frame
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as a single qubit Indeed the information containing in a single qubit
is exactly equal to that featuring an inertialreference frame
Even more, both are mathematically isomorphic to
each other and still evidence about the directtransition from informational to physical concepts
One can see in detail how:
A qubit = an inertial reference frameA point of the ball = The initial position
A point on the surface (sphere) = The velocity
The superpositional norm, 1 = The light speed, c
l b
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|defines a point of the unit ball and thus it can
be interpreted as the position of a reference frame|and |define a point of the unit sphere and
thus |can be interpreted as the velocity of the
same reference frame, which should be inertial
+ =
|
|
, are two complex numbers:
|, |are two orthonormalvectors or a basis such as two
orthogonal great circles of
the unit ball
Speed as
Positionas
The speed of light, c, as 1
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The multiverse in a single universe
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The multiverse in a single universe
The Bing Bang is one solution of the above
equation however only under the additionalcondition of that the Standard model is universal
at least for our universe
However, if one unifies the many-worlds interpretationof quantum mechanics (Everett III 1957) with
the smooth general relativity, the multiverse should be
equivalent to the universe just as quantum mechanics
unifies discrete and smooth motion
Furthermore, any different enough reference frame in
the universe should possesses a proper standard model
different from any each in general
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Many discretely separated parallel worldsfor any measurement
World 1 World 2 World N... ...
Many smoothly flowing inertial reference frames
for any point in space-time
Referenceframe 1
Referenceframe 2
Referenceframe N... ...
One-to-oneOne-to-one One-to-one
R f
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World 1 World 2 World N... ...
Referenceframe 1
Referenceframe 2
Referenceframe N... ...
Standard
model 1
Standard
model 2
Standard
model N
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Th fThe empty sell
h
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TheThe
The
th
(+n)th
Transfinitebits
The sense ofSchrdingerequation
p yof the nthqubit
The empty sells oftwo equivalent, but
complementaryqubits SU(2)SU(3)
The
The special valueof the qubit = theStandard model
SU(2): as
3-sphere
SU(3): as3 numbers
U(1)
The three privileged sub-choicesi t f th St d d d l
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in terms of the Standard model Each of those three choices can be further
interpreted as the source correspondingly ofthe first, second, and third generation of thefermions (i.e. the alleged particles of matter) of
the Standard model The strong interaction can be considered as
the symmetry of the three single choices
The weak one, as the symmetry of the pairs ofthese three choices or as the symmetry ofa 3-sphere
The electromagnetic one, by means of the single
triple of these choice The Big Bang: The record of a value inthe empty sell of a qubit
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SU(2)SU(3)
SU(2): The symmetryof the chosen value
of the qubit asthe rotation of
a 3-sphere
SU(3): The symmetry ofthe same chosen valueof the qubit as 3independent real
numbers
U(1)
Quarks Leptons
Gluons
Photon
Bosons
U(1): The symmetry of
the empty sell ofthe qubit
the empty sell of a qubit
TheStandardmodel
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Conclusions (2):
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Quantum information allows of understanding theStandard model by means of the symmetries ofexactly three underlying choices
These three choices constitute a privileged qubitequivalent to a privileged inertial reference frame
Quantum information decomposes the quanta tochoices
Choice is the atom of the being in final analysis
Choice in turn originates from time and its coursefrom the unorderble or coherent future to the well-ordered or unchangeable past by the choices ofthe present
References (1):
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Planck Collaboration and Tauber, J., 2013, Planck 2013 results.I. Overview of products and scientific results. Astronomy andAstrophysics (in print, accepted 17 May 2014, DOI:10.1051/0004-6361/201321529). Also available at:http://planck.caltech.edu/pub/2013results/Planck_2013_results_01.pdf accessed 27 August 2014.
Aspect, A. et al, 1981, Experimental Tests of Realistic Local
Theories via Bells Theorem. Physical Review Letters, 47 (7),460-463. Aspect, A. et al, 1982, Experimental Realization of Einstein-
Podolsky-Rosen-Bohm Gedanken Experiment: A NewViolation of Bells Inequalities. Physical Review Letters, 49 (2),91-94.
Bell, J., 1964, On the Einstein Podolsky Rosen paradox.Physics(New York), 1 (3), 195-200.
Born, M., 1926, Physical aspects of quantum mechanics.
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References (2):
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( )
Dalton, J., 1805, Experimental Enquiry into the Proportion of
the several Gases or Elastic Fluids, constituting theAtmosphere. Memoirs of the Literary and PhilosophicalSociety of Manchester, Second Series, 1, 244-258.
Dalton, J., 1805, On the Absorption of Gases by Water andother Liquids. Memoirs of the Literary and PhilosophicalSociety of Manchester, Second Series, 1, 271-287.
Dalton, J., 1808,A New System of Chemical Philosophy (Part1), Manchester, printed by S. Russell for R. Bickerstaff, Strand,London.
Einstein, A., 1920,ther und Relativittstheorie, Berlin,Springer. Einstein, A. et al, 1935, Can Quantum-Mechanical
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Everett III, H., 1957, Relative state Formulation ofQuantum Mechanics.Reviews of Modern Physics, 29 (3), 454-462.
Higgs, P., 1964, Broken symmetries and the masses of gaugebosons. Physical Review Letters, 13(16): 508-509.
Kelvin, 1901, Nineteenth-Century Clouds over the Dynamical
Theory of Heat and Light. Philosophical Magazine Series 6, 2(7), 1-40. Leucippus and Democritus (ed. Taylor, C.), 1999,
The atomists, Leucippus and Democritus: fragments: a textand translation with a commentary, Toronto, University ofToronto Press.
Peebles, P. and Ratra, B., 2003, The cosmological constantand dark energy. Reviews of Modern Physics,75 (2), 559606.
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M it
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Muito
obrigado
pela sua
ateno!
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Congratulamo-noscom suas
perguntas e
comentrios!