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UID:0-824@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20220621T110000
DTEND;TZID=Europe/Paris:20220621T120000
DTSTAMP:20220610T090034Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/seminaire-du-lptm
 s-marko-znidaric-lubiana/
SUMMARY:Séminaire du LPTMS : Marko  Žnidarič (Ljubljana University) - Sa
 lle des séminaires du FAST et du LPTMS\, bâtiment Pascal n°530 - 21 Jui
 n 22 11:00
DESCRIPTION:Non-Hermitian phantoms\nMarko Žnidarič (University of Ljublja
 na)\n\nHybrid seminar: onsite + zoom.\n\nhttps://cnrs.zoom.us/j/9600269725
 7?pwd=VXViU0EvMWJDa0FFMXhXbE5qMjdsZz09\nMeeting ID: 960 0269 7257\nPasscod
 e: qi8a9S\n\n\nDescribing full unitary dynamics of a many-body system is d
 ifficult and also unpractical. Focusing on a coarse-grained dynamics\, or 
 few select smooth observables\, often results in a more compact non-unitar
 y evolution. Studying bipartite entanglement dynamics in random circuits o
 ne can derive a Markovian transfer matrix description that harbors rather 
 intriguing many-body non-Hermitian physics. The speed of generating entang
 lement is not given by the 2nd largest eigenvalue of the transfer matrix\,
  but rather by a phantom eigenvalue that is not in the spectrum of any fin
 ite transfer matrix. Resolution of this seeming paradox will involve a spe
 ctrum that is completely discontinuous in the thermodynamic limit. When de
 aling with finite non-Hermitian matrices it can turn out that being exact 
 is actually wrong\, while being slightly wrong is correct.
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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