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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-424@lptms.universite-paris-saclay.fr
DTSTART:20160407T143000Z
DTEND:20160407T153000Z
DTSTAMP:20160325T152627Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-yasar-atas/
SUMMARY:Séminaire du LPTMS: Yasar ATAS *** séminaire exceptionnel *** - L
 PTMS\, salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay - 7 Avr 16 14:
 30
DESCRIPTION:Exact many-body dynamics of a harmonically quenched Tonks-Girad
 eau gas at finite temperature\nYasar ATAS (University of Queensland\, Bris
 bane\, Australia)\nUltracold quantum gases offer a fascinating and remarka
 bly insightful playground for exploring and understanding the fundamentals
  of out-of-equilibrium behaviour of quantum matter. Experimental systems w
 hose non-equilibrium dynamics can be described by exactly solvable models 
 of quantum many-body theory play a particularly important role.  A paradi
 gmatic example in this realm is the Tonks-Girardeau (TG) gas  of strongly
  interacting bosons\, previously treated only for zero-temperature dynamic
 s.\nIn this talk\, I will present an exact finite temperature dynamical th
 eory of a harmonically trapped TG gas\, and apply it to the problem of bre
 athing-mode oscillations after a sudden confinement quench.  The method i
 s based on the Fredholm determinant expression of the density matrix at fi
 nite temperature and provides a straightforward and efficient technique to
  compute finite temperature properties of TG. I will identify physical reg
 imes for observing a phenomenon of frequency doubling in the oscillations 
 of the momentum distribution of the gas.  Exact results will be compared 
 to a finite-temperature hydrodynamic approach based on local density appro
 ximation with the frequency quasi-doubling phenomena surprisingly well cap
 tured. The exact dynamical theory developed opens the way to solving finit
 e-temperature problems involving anharmonic traps\, as well as arbitrary q
 uench protocols of the trapping potential.\n&nbsp\;
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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