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PRODID:UW-Madison-Physics-Events
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UID:UW-Physics-Event-8171
DTSTART:20230201T170000Z
DTEND:20230201T180000Z
DTSTAMP:20260414T055037Z
LAST-MODIFIED:20230124T202439Z
LOCATION:5310 Chamberlin Hall 
SUMMARY:Superradiance in ordered atomic arrays\, Atomic Physics Semina
 r\, Stuart Masson \, Columbia University
DESCRIPTION:Collective phenomenona are found in every branch of scienc
 e\; the behavior of the whole differs strongly from the behavior of th
 e individual elements. In quantum optics\, a hallmark example is Dicke
  superradiance. Here\, a fully inverted ensemble of atoms emits a shor
 t and bright light pulse\, known as the superradiant burst\, that init
 ially grows in intensity. This is in stark contrast to independent ato
 ms which decay exponentially\, emitting a pulse that monotonically dec
 reases in time. Experiments in dense disordered systems have observed 
 the superradiant burst\, but there\, inhomogeneous broadening plays a 
 large role\, making the systems hard to model or control. In contrast\
 , ordered arrays have much lower inhomogeneity - atoms in the bulk all
  see the same set of neighbors - making them an ideal platform to stud
 y dissipative many-body physics. Here\, we show the conditions under w
 hich such systems produce a superradiant burst. We go beyond two-level
  approximations\, and demonstrate that long-wavelength transitions fro
 m ytterbium and strontium atoms can be used to observe such physics. O
 ur work represents an important step in harnessing such systems to bui
 ld quantum optical sources and as dissipative generators of entangleme
 nt.
URL:https://www.physics.wisc.edu/events/?id=8171
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