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TZID:Europe/Paris
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UID:0-752@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20201201T110000
DTEND;TZID=Europe/Paris:20201201T120000
DTSTAMP:20201123T231544Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-thibaud-maimbourg-lptms/
SUMMARY:Séminaire du LPTMS : Thibaud Maimbourg (LPTMS) - LPTMS (100% onlin
 e seminar) - 1 Déc 20 11:00
DESCRIPTION:Bath-induced Zeno localization in driven many-body quantum syst
 ems\nThibaud Maimbourg (LPTMS)\n\nOnline seminar --- ZOOM Meeting ID: 979 
 6114 1696 --- Password: 105367 ---   \n\n\nIn this talk I will first discu
 ss the main conditions for a many-body quantum system to reach a thermal s
 tationary state. I will then focus on the mechanism by which\, relaxing on
 e of these conditions\, the system in contact with a bath of spatially-loc
 alized vibrational modes can fail to reach such a state. As a realistic il
 lustration\, I shall consider a quantum interacting spin system subject to
  an external drive\, serving as a model for dynamic nuclear polarization (
 DNP) protocols. Those protocols\, besides their concrete applications\, re
 present an experimental platform to investigate ergodicity of the stationa
 ry state. Even when the isolated system is ergodic\, a sufficiently strong
  coupling to the bath may break ergodicity\, due to many-body quantum Zeno
  effect. In the DNP context\, this result provides an explanation of the b
 reakdown of the so-called "thermal mixing" regime (effective equilibrium)\
 , experimentally observed above 4 – 5 Kelvin.\n\nRef.: arXiv:2009.11784.
  Joint work with D. M. Basko\, M. Holzmann (LPMMC Grenoble)\, A. Rosso (LP
 TMS).
CATEGORIES:seminars
LOCATION:LPTMS (100% online seminar)\, LPTMS - Bâtiment Pascal n° 530 rue
  André Rivière - Université Paris-Saclay\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=LPTMS - Bâtiment Pascal n
 ° 530 rue André Rivière - Université Paris-Saclay\, Orsay\, 91405\, Fr
 ance;X-APPLE-RADIUS=100;X-TITLE=LPTMS (100% online seminar):geo:0,0
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TZID:Europe/Paris
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BEGIN:STANDARD
DTSTART:20201025T020000
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