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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-233@lptms.universite-paris-saclay.fr
DTSTART:20140210T113000Z
DTEND:20140210T120000Z
DTSTAMP:20140206T170712Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/journal-club-andr
 iy-gudyma/
SUMMARY:Journal-Club: Andriy Gudyma - LPTMS\, salle 201\, 2ème étage\, B
 ât 100\, Campus d'Orsay - 10 Fév 14 11:30
DESCRIPTION:Journal-Club: A superheated Bose-condensed gas\nAndriy Gudyma\,
  LPTMS\nPaper: Alexander L. Gaunt\, Richard J. Fletcher\, Robert P. Smith 
 &amp\; Zoran Hadzibabic\, A superheated Bose-condensed gas\, Nature Physic
 s 9\, 271–274 (2013). \nAbstract :Our understanding of various states of
  matter usually relies on the assumption of thermodynamic equilibrium. How
 ever\, the transitions between different phases of matter can be strongly 
 affected by non-equilibrium phenomena. Here we demonstrate and explain an 
 example of non-equilibrium stalling of a continuous\, second-order phase t
 ransition. We create a superheated atomic Bose gas\, in which a Bose–Ein
 stein condensate (BEC) persists above the equilibrium critical temperature
 \, Tc\, if its coupling to the surrounding thermal bath is reduced by tuni
 ng interatomic interactions. For vanishing interactions the BEC persists i
 n the superheated regime for a minute. However\, if strong interactions ar
 e suddenly turned on\, it rapidly boils away. Our observations can be unde
 rstood within a two-fluid picture\, treating the condensed and thermal com
 ponents of the gas as separate equilibrium systems with a tunable inter-co
 mponent coupling. We experimentally reconstruct a non-equilibrium phase di
 agram of our gas\, and theoretically reproduce its main features.
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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