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UID:0-953@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20240430T110000
DTEND;TZID=Europe/Paris:20240430T120000
DTSTAMP:20240422T133909Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-berislav-buca-niels-bohr/
SUMMARY:Séminaire du LPTMS : Berislav Buca (Niels Bohr Institute) - Salle 
 des séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 30 Avr 24 
 11:00
DESCRIPTION:Eigenoperator thermalization\nBerislav Buca (Niels Bohr Institu
 te)\n**Online seminar**\n\nI will provide a framework for computing time-a
 veraged dynamics in locally interacting systems in any dimension. It is ba
 sed on pseudolocal dynamical symmetries generalising pseudolocal charges a
 nd unifies seemingly disparate manifestations of quantum non-ergodic dynam
 ics including quantum many-body scars\, continuous\, discrete and dissipat
 ive time crystals\, Hilbert space fragmentation\, lattice gauge theories\,
  and disorder-free localization. Using the theory two novel types of phase
  transitions are introduced: 1) The "scarring phase transition" where the 
 order parameter is the locality of the projected local quantities - for ce
 rtain initial states persistent oscillations are present. 2) The "fragment
 ation phase transition" for which long-range order is established in an en
 tire phase due to presence of certain non-local strings. Two prototypical\
 , but otherwise mostly intractable\, models are solved using the theory: 1
 ) a spin 1 scarred model and 2) the t-J_z model with fragmentation.\n\nRef
 erences:\nBerislav Buca. Unified theory of local quantum many-body dynamic
 s: Eigenoperator thermalization theorems. Phys. Rev. X 13\, 031013 (2023).
 \nBenjamin Doyon. Thermalization and pseudolocality in extended quantum sy
 stems. Commun. Math. Phys. 351: 155-200 (2017).\n\nZoom information:\nhttp
 s://universite-paris-saclay-fr.zoom.us/j/96277574790?pwd=NGRjYkZOdWZmTk91M
 G1KQUxQaC9Ldz09\nMeeting ID: 962 7757 4790 Passcode: 844783
CATEGORIES:seminars
LOCATION:Salle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°53
 0\, rue André Riviere\, Orsay\, 91405\, France
X-APPLE-STRUCTURED-LOCATION;VALUE=URI;X-ADDRESS=rue André Riviere\, Orsay\
 , 91405\, France;X-APPLE-RADIUS=100;X-TITLE=Salle des séminaires du FAST 
 et du LPTMS\, bâtiment Pascal n°530:geo:0,0
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TZID:Europe/Paris
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DTSTART:20240331T030000
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