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SUMMARY:The Dicke Quantum Phase Transition and Supersolidity - Prof. Tilma
 n Esslinger\, ETH\, Zurich
DTSTART:20101027T150000Z
DTEND:20101027T160000Z
UID:TALK27251@talks.cam.ac.uk
CONTACT:Leona Hope-Coles
DESCRIPTION:It is an almost magic toolbox\, which has been created around 
 quantum gas experiments. This toolbox includes bosons\, fermions\, weak an
 d strong interactions\, low-dimensional systems\, optical lattices and mor
 e. Yet\, the observed physics has been governed by short ranged interactio
 ns between the particles. In this talk\, I will report on an experiment in
  which we have succeeded in creating a quantum gas with infinitely long-ra
 nged interactions. The interactions are mediated by an optical cavity. We 
 observe a phase transition from a superfluid into a self-organized state w
 ith a broken spatial symmetry\, which can be regarded as a supersolid phas
 e. This observation is a realization of the Dicke quantum phase transition
  which has been predicted more than 30 years ago\, but has never been real
 ized in an experiment. \n
LOCATION:Pippard Lecture Theatre\, Cavendish Laboratory
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