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SUMMARY:Quantum LEGOs: Building large quantum systems atom-by-atom
DTSTART:20180410T103000
DTEND:20180410T113000
DTSTAMP:20260407T051123Z
UID:71cfaa87a6c4979e276a08344e4c693d18a84d6587353d7f5cbb4b0c
CATEGORIES:Conferences - Seminars
DESCRIPTION:Dr Hannes Bernien\, Harvard University\nAbstract: The realiz
 ation of large-scale controlled quantum systems is an exciting frontier in
  modern physical science. In this talk\, I will introduce a new approach b
 ased on cold atoms in arrays of optical tweezers. We use atom-by-atom asse
 mbly to deterministically prepare arrays of individually controlled cold a
 toms. A measurement and feedback procedure eliminates the entropy associat
 ed with the probabilistic trap loading and results in defect-free arrays o
 f over 60 atoms [1]. Strong\, coherent interactions are enabled by couplin
 g to atomic Rydberg states. We realize a programmable Ising-type quantum s
 pin model with tunable interactions and system sizes of up to 51 qubits. W
 ithin this model we observe transitions into ordered states (Rydberg cryst
 als) that break various discrete symmetries\, verify high-fidelity prepara
 tion of ordered states\, and investigate dynamics across the phase transit
 ion in large arrays of atoms [2].\nAn alternative\, hybrid approach for en
 gineering interactions is the coupling of atoms to nanophotonic structures
  in which guided photons mediate interactions between atoms. I will discus
 s our progress towards entangling two atoms that are coupled to a photonic
  crystal cavity and I will outline the exciting prospects of this approach
  for scaling the system to large distances in a quantum network.\n \n[1] 
 Science 354\, 1024 (2016)\n[2] Nature 551\, 579 (2017)
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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