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TZID:Europe/Paris
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BEGIN:VEVENT
UID:1-46@lptms.universite-paris-saclay.fr
DTSTART:20120606T143000Z
DTEND:20120606T143000Z
DTSTAMP:20130418T124459Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-iosif-bena/
SUMMARY:Séminaire "Fluides Quantiques" du LPTMS : David Papoular - LPTMS\,
  salle 201\, 2ème étage\, Bât 100\, Campus d'Orsay - 6 Juin 12 14:30
DESCRIPTION:Cooling by heating a superfluid\nDavid Papoular (BEC Center\, T
 rento)\nWe consider a uniform superfluid confined in two compartments conn
 ected by a superleak and initially held at equal temperatures. If one of t
 he two compartments is heated\, a fraction of the superfluid will flow thr
 ough the superleak. We show that\, under certain thermodynamic conditions\
 , the atoms flow from the hotter to the colder compartment\, contrary to w
 hat happens in the fountain effect observed in superfluid Helium. This flo
 w causes quantum degeneracy to increase in the colder compartment. In supe
 rfluid Helium\, this novel thermomechanical effect takes place in the phon
 on regime of very low temperatures. In dilute quantum gases\, it occurs at
  all temperatures below Tc. The increase in quantum degeneracy reachable t
 hrough the adiabatic displacement of the wall separating the two compartme
 nts will also be discussed.
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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