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UID:0-771@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20210525T110000
DTEND;TZID=Europe/Paris:20210525T120000
DTSTAMP:20210520T081339Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-marko-medenjak-lpens/
SUMMARY:Séminaire du LPTMS : Marko Medenjak (LPENS) - LPTMS (100% online s
 eminar) - 25 Mai 21 11:00
DESCRIPTION:Bounds on time translation symmetry breaking \nMarko Medenjak (
 LPENS)\n\nOnline seminar --- Zoom Meeting ID: 951 9908 9593 -- Passcode: a
 sk L. Mazza and D. Petrov --\n\nAbstract: Isolated systems consisting of m
 any interacting particles are generally\nassumed to relax to a stationary 
 state\, whose macroscopic properties are\ndescribed by the laws of thermod
 ynamics and statistical physics. In this\nseminar we will explore whether 
 quantum systems can avoid relaxation and\nif stationarity itself can be un
 stable\, meaning that even the slightest\ndisturbance of the thermal state
  leads to perpetually changing physical\nproperties. Analogous behaviour w
 as experimentally observed in driven\nquantum systems (Floquet time crysta
 ls)\, in which the response of the\nsystem does not follow the period of t
 he driving. We will show that time\ntranslation symmetry breaking is possi
 ble even in perfectly isolated\nquantum systems without any driving\, and 
 provide rigorous bounds on it\nin terms of dynamical symmetries. Finally\,
  we will see how time\ntranslation symmetry breaking occurs in the Heisenb
 erg XXZ spin chain\,\nand show that its properties are a no-where continuo
 us (fractal)\nfunction of the system parameters.\n\n[1] M. Medenjak\, B. B
 uča\, and D. Jaksch\, Phys. Rev. B 102\, 041117(R) (2020).\n[2] M. Medenj
 ak\, T. Prosen\, and L. Zadnik\, SciPost Phys. 9\, 3 (2020). 
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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DTSTART:20210328T030000
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