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:1-496@lptms.universite-paris-saclay.fr
DTSTART:20170411T110000Z
DTEND:20170411T120000Z
DTSTAMP:20170329T151604Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-deepak-bhat/
SUMMARY:Séminaire du LPTMS: Deepak Bhat - LPTMS\, salle 201\, 2ème étage
 \, Bât 100\, Campus d'Orsay - 11 Avr 17 11:00
DESCRIPTION:Dynamics of a piston pushed by a single particle gas as a micro
 scopic model for Szilard engine\nDeepak Bhat (ICTS\, Bangalore\, India) \
 nMotivated by the Szilard engine\, we have studied the dynamics of a pisto
 n of large mass M inside a 1D cylinder\, pushed by repeated elastic collis
 ions with a single particle (of smaller mass m) which is in contact with a
  thermal reservoir of temperature T. Additionally\, piston is assumed to b
 e moving under influence of an external force. By expanding the underlying
  master equation of the piston-particle system in terms of the small param
 eter (m/M)1/2\, we show that\, an effective equation of motion of the pist
 on can be deduced by integrating out the small particle. Given finite but 
 large mass of the piston\, we show that at times of order √M the Piston
 ’s motion is described by a determinstic dynamics while at larger times\
 , the piston’s motion becomes stochastic and is described by a Langevin 
 equation. Interestingly\, we note that the dissipation coefficient γ depe
 nds on piston position X\, and is also function of time t. In particular\,
  it changes from an initial value (1/X)(8mkBT/π)1/2 and increases as log(
 t)/X asymptotically. We argue that the logarithmic increase of γ is assoc
 iated to the interesting and unusual slow relaxation of particle confined 
 within the reservoir and the piston.\n\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