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TZID:Europe/Paris
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UID:0-1105@lptms.universite-paris-saclay.fr
DTSTART;TZID=Europe/Paris:20260602T110000
DTEND;TZID=Europe/Paris:20260602T120000
DTSTAMP:20260526T104442Z
URL:http://www.lptms.universite-paris-saclay.fr/seminars/lptms-seminar-xia
 ngyu-cao-lpens-paris/
SUMMARY:LPTMS Seminar: Xiangyu Cao (LPENS\, Paris) - Salle des séminaires 
 du FAST et du LPTMS\, bâtiment Pascal n°530 - 2 Juin 26 11:00
DESCRIPTION:Planckian bound on quantum dynamical entropy\nXiangyu Cao (LPEN
 S\, Paris)\n&nbsp\;\nKolmogorov and Sinai's dynamical entropy is a quantit
 ative diagnosis of classical chaos. However its quantum generalisations\, 
 developed by mathematical physicists around 1990\, have been overlooked by
  the recent literature on many-body quantum chaos. After a gentle backgrou
 nd review\, I will explain Connes-Narnhofer-Thirring's quantum dynamical e
 ntropy (simplified) in terms of monitored quantum dynamics. I will show th
 at the entropy rate can be nonzero\, and exactly calculable\, in many-body
  systems away from semiclassical/large N limits\, and arguably satisfy a P
 lanckian bound\, akin to that of Maldacena-Shenker-Stanford on out of time
  correlators. Time permitting I will discuss other quantum dynamical entro
 pies and/or related questions on decoherent histories in many-body systems
 . Based on 2507.20914 and 2603.15753.
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:20260329T030000
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