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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-544@lptms.universite-paris-saclay.fr
DTSTART:20180123T110000Z
DTEND:20180123T120000Z
DTSTAMP:20171230T190333Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-pierre-elie-larre-2/
SUMMARY:Séminaire du LPTMS: Pierre-Elie Larré &amp\; Clément Tauber - LP
 TMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay - 23 Jan 18 11:
 00
DESCRIPTION:Quantum simulating many-body phenomena with propagating light\n
 Pierre-Elie Larré (Université de Cergy-Pontoise)\nWe consider the propag
 ation of a quantum light field in a cavityless nonlinear dielectric. In th
 is all-optical platform\, the space propagation of the field's envelope ma
 y be mapped onto the time evolution of a quantum fluid of interacting phot
 ons. The resulting many-body quantum system constitutes a particular class
  of quantum fluids of light and presently attracts a growing interest as a
  powerflul tool for quantum simulation. I will present recent theoretical 
 and experimental progresses in this rapidly emerging research field\, incl
 uding investigations on superfluidity\, elementary excitations\, disorder\
 , quantum quenches\, prethermalization\, thermalization\, and Bose-Einstei
 n condensation.\n\n\n\nBulk-edge correspondence for Floquet topological in
 sulators\nClément Tauber (ETH\, Zürich)\nFloquet topological insulators 
 describe independent electrons on a lattice driven out of equilibrium by a
  time-periodic Hamiltonian\, beyond the usual adiabatic approximation. In 
 dimension two such systems are  characterized by integer-valued topologic
 al indices associated to the  unitary propagator\, alternatively in the b
 ulk or at the edge of a  sample. In this talk I will give new definitions
  of the two indices\,  relying neither on translation invariance nor on a
 veraging\, and show  that they are equal. In particular weak disorder and
  defects are  intrinsically taken into account. Finally indices can be de
 fined when  two driven sample are placed next to one another either in sp
 ace or in  time\, and then shown to be equal. The edge index is interpret
 ed as a  quantized pumping occurring at the interface with an effective v
 acuum.
CATEGORIES:seminars
LOCATION:LPTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay\, 15 
 Rue Georges Clemenceau\, Orsay\, 91405\, France
GEO:48.698185;2.181768
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=15 Rue Georges Clemenceau\,
  Orsay\, 91405\, France;X-APPLE-RADIUS=100;X-TITLE=LPTMS\, salle 201\, 2è
 me étage\, Bât 100\, Campus d'Orsay:geo:48.698185,2.181768
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