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SEQUENCE:2
UID:UW-Physics-Event-4883
DTSTART:20181016T150000Z
DURATION:PT1H0M0S
DTSTAMP:20260309T000949Z
LAST-MODIFIED:20180927T143012Z
LOCATION:5310 Chamberlin Hall
SUMMARY:Exploring quantum many-body dynamics and quantum information p
 rocessing with reconfigurable arrays of atoms\, Atomic Physics Seminar
 \, Prof. Hannes Bernien\, University of Chicago
DESCRIPTION:Controllable\, coherent quantum many-body systems can prov
 ide insights into fundamental properties of quantum matter\, enable th
 e realization of exotic quantum phases\, and ultimately offer a platfo
 rm for quantum information processing that could surpass any classical
  approach. Recently\, reconfigurable arrays of neutral atoms with prog
 rammable Rydberg interactions have become promising systems to study s
 uch quantum many-body phenomena\, due to their isolation from the envi
 ronment\, and high degree of control. Using this approach\, we demonst
 rate high fidelity manipulation of individual atoms and entangled atom
 ic states. Furthermore\, we realize a programmable Ising-type quantum 
 spin model with tunable interactions and system sizes up to 51 qubits.
  Within this model\, we observe transitions into ordered states that b
 reak various discrete symmetries. Varying the rate at which the quantu
 m phase transition is crossed allows us to observe the power-law scali
 ng of the correlation length\, as predicted by the Kibble-Zurek mechan
 ism. The scaling exponent observed is consistent with theoretical pred
 ictions for the Ising universality class when sweeping into a Z2-order
 ed phase\, and with the 3-state Chiral Clock Model for transitions int
 o the Z3-ordered phase.
\n
\nAn alternative\, hybrid approach for engi
 neering interactions is the coupling of atoms to nanophotonic structur
 es in which guided photons mediate interactions between atoms. I will 
 discuss our progress towards entangling two atoms that are coupled to 
 a photonic crystal cavity and outline the exciting prospects of scalin
 g these systems to many qubits and to quantum networks over large dist
 ances.
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URL:https://www.physics.wisc.edu/events/?id=4883
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