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DTSTART:20200329T030000
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DTSTAMP:20260406T042327Z
UID:1586271600@ist.ac.at
DTSTART:20200407T170000
DTEND:20200407T190000
DESCRIPTION:Speaker: Soonwon Choi\nhosted by Maksym Serbyn \nAbstract: Quan
 tum information science seeks to understand and control quantum systems wi
 th high entanglement and complexity\, defining a new frontier of physics. 
 In this talk\, we discuss a novel phenomenon that arises in this regime: a
  phase transition in the dynamics of quantum entanglement and information.
  We consider a generic quantum many-body system coupled to a noisy environ
 ment\, which we model with random unitary circuits interspersed with proje
 ctive measurements. The interplay between unitary evolution and measuremen
 ts leads to a sharp phase transition: at high measurement rates\, any cohe
 rent information in the system is completely lost\, while at sufficiently 
 low rates\, an extensive amount of information is robustly protected. The 
 nature of the phase transition can be understood from two complementary pe
 rspectives based on quantum information theory and classical statistical m
 echanics. As applications of our work\, we develop a novel way to probe qu
 antum chaos\, quantitatively examine Google’s recent test of quantum sup
 remacy\, and shed light on the computational complexity of simulating quan
 tum dynamics.
LOCATION:Webinar\, ISTA
ORGANIZER:
SUMMARY:Soonwon Choi: [Webinar] Phase transitions in the dynamics of quantu
 m information 
URL:https://talks-calendar.ista.ac.at/events/2744
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