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DTSTART:20200329T030000
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DTSTAMP:20201028T152906Z
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 Googleâ€™s recent test of quantum sup
remacy\, and shed light on the computational complexity of simulating quan
tum dynamics.
LOCATION:Webinar\, IST Austria
ORGANIZER:
SUMMARY:[Webinar] Phase transitions in the dynamics of quantum information
URL:https://talks-calendar.app.ist.ac.at/events/2744
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