the uva quantum gases & quantum information group · control everything … potential....
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The UvA Quantum Gases & Quantum Information
group
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Overview
How?What? Why?
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Ultracold quantum gases103 K
1 mK
1 µK
1 K
1 nK BEC
d
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Fundamental insights Quantum devices
Understand quantum materials Atomic clocks
Why ultracold quantum gases?
Ye groupJILA
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Many-body systems
www.thepistrophy.com
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Quantum many-body physics
Especially difficult:
Fermionic systems
?Frustrated systems Dynamics
𝑡𝑡
�𝑂𝑂
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Quantum simulation (and beyond)
Control everything
…
potential interactions internal state
difficult to studyquantum system
well-controlledultracold systemsimplified model
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Alkaline-earth elementsSr, Ca
New ultracold systems
LanthanidesDy, Ho, Er, Tm, Yb
Dipolar moleculesclosed-shell: KRb, NaK, RbCs,...
open-shell: RbYb, RbSr, YbCs
Rydberg atoms
IonsMore interesting interactions
Benefits
• long-range • anisotropic
More internal structure
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Rydberg atoms
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Other systems we exploreRbSr molecules
Perpetual atom laser
Sr quantum gas microscope
K quantum gases
Veni & Vici
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Overview
How?What? Why?
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Experimental realizationOur fridge
cooling laser atomic beamfrom oven
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Laser cooling
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Experimental realizationThe fridge
cooling laser atomic beamfrom oven
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MOT
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Why not more?
hk
Photons heatslowest atoms.
Let‘s trap andcool atoms
without near-resonant light!
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Optical dipole trap
electric field
induced electric dipole
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Optical dipole trap
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Infrared laser beam
Trapped atomic cloud
Optical dipole trap
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Evaporative cooling
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Absorption imaging
CCD
dipole trapthermal cloud
gravity
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Signatures of BEC
CCD
dipole trapBEC
gravity
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BEC phase transition
T>Tc
T<Tc
T<<Tc
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The UvA Quantum Gases & Quantum Information
group