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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:2
UID:UW-Physics-Event-6739
DTSTART:20220415T203000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T113402Z
LAST-MODIFIED:20220412T122047Z
LOCATION:2103 Chamberlin Hall
SUMMARY:Atoms Interlinked by Light: Programmable Interactions and Emer
 gent Geometry\, Physics Department Colloquium\, Monika Schleier-Smith\
 , Stanford University
DESCRIPTION:The graph of interactions in a quantum many-body system is
  crucial for governing the flow of information and the structure of co
 rrelations.  We engineer programmable nonlocal interactions in an arra
 y of atomic ensembles within an optical resonator\, where photons conv
 ey information between distant atomic spins.  In our system of spin-1 
 atoms\, the photon-mediated interactions manifest in the formation of 
 correlated atom pairs.  For all-to-all interactions\, we verify the re
 sulting entanglement by observing spin-nematic squeezing.  We furtherm
 ore achieve versatile control of the graph of interactions by programm
 ing the spectrum of an optical drive field\, thereby realizing effecti
 ve geometries entirely distinct from the physical geometry of the arra
 y.  We apply this toolbox to explore frustrated interactions\, non-tri
 vial topologies\, and an emergent treelike geometry inspired by concep
 ts of quantum gravity.
URL:https://www.physics.wisc.edu/events/?id=6739
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