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TZID:Europe/Paris
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BEGIN:VEVENT
UID:0-586@lptms.universite-paris-saclay.fr
DTSTART:20180306T113000Z
DTEND:20180306T120000Z
DTSTAMP:20180221T170903Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-giulio-bertoli/
SUMMARY:Séminaire du LPTMS: Giulio Bertoli - LPTMS\, salle 201\, 2ème ét
 age\, Bât 100\, Campus d'Orsay - 6 Mar 18 11:30
DESCRIPTION:Finite temperature disordered bosons in two dimensions\nGiulio 
 Bertoli (LPTMS\, Université Paris-Sud)\nIn this talk\, I will present a s
 tudy of the phase transitions in a two dimensional weakly interacting Bose
  gas in a random potential at finite temperatures. It is possible to ident
 ify superfluid\, normal fluid and insulator phases. The study of the effec
 t of interaction between particles on localization demonstrates that inter
 acting particles can undergo a many-body localization-delocalization trans
 ition\, that is the transition from insulator to fluid state. I will also 
 discuss the influence of disorder on the BKT transition between superfluid
  and normal fluid\, in order to construct the phase diagram. At T=0 one ha
 s a tricritical point\, where the three phases coexist. It is shown that t
 he truncation of the energy distribution function at the trap barrier\, wh
 ich is a generic phenomenon in evaporative cooling of cold atoms\, limits 
 the growth of the localization length\, so that the insulator phase is pre
 sent at any temperature.\n\n	Reference: G. Bertoli\, V.P. Michal\, B.L. Al
 tshuler\, G.V. Shlyapnikov\, Finite temperature disordered bosons in two d
 imensions\, preprint cond-mat.dis-nn arXiv:1708.03628\n
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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