BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//wp-events-plugin.com//6.4.7.2//EN
TZID:Europe/Paris
X-WR-TIMEZONE:Europe/Paris
BEGIN:VEVENT
UID:1-23@lptms.universite-paris-saclay.fr
DTSTART:20120208T140000Z
DTEND:20120208T140000Z
DTSTAMP:20120208T224906Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-fluides
 -quantiques-chris-westbrook/
SUMMARY:Seminaire Fluides Quantiques : Chris Westbrook  - LPTMS\, salle 201
 \, 2ème étage\, Bât 100\, Campus d'Orsay - 8 Fév 12 14:00
DESCRIPTION:Acoustic analog of the dynamical Casimir effect in a BEC\nChris
  Westbrook\, LCFIO\, Palaiseau\nAlthough we often picture the quantum vacu
 um as containing virtual quanta whose observable effects are only indirect
 \, it is a remarkable prediction of quantum field theory that the vacuum c
 an generate real particles when boundary conditions are suddenly changed. 
 Thus the dynamical Casimir effect results in the spontaneous generation of
  photon pairs in an empty cavity whose boundaries are rapidly accelerating
 . A recent experiment has demonstrated this effect in the microwave regime
  using superconducting circuits. Acoustic analogs of this effect exist as 
 well\, and Bose Einstein condensates are attractive candidates in which to
  study such analogs because their low temperatures promise to reveal quant
 um effects. I will - describe our group's work to develop an acoustic anal
 og to the dynamical Casimir effect by modulating the confinement of a Bose
 -Einstein - condensate. We are able to observe the generation of correlate
 d pairs of excitations both in the phonon and particle-like regimes in a p
 rocess which also formally resembles parametric down conversion..\n
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
END:VEVENT
END:VCALENDAR