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SUMMARY:Memories in Quantum Many-Body Dynamics: The case of Many Body Loca
lization
DTSTART;VALUE=DATE-TIME:20190924T103000Z
DTEND;VALUE=DATE-TIME:20190924T113000Z
DTSTAMP;VALUE=DATE-TIME:20200806T130448Z
UID:indico-event-7354@cern.ch
DESCRIPTION:A basic tenet of equilibrium statistical mechanics is that lon
g-time averages of local quantities in a many body system do not depend on
initial state of the system. They can be calculated from a distribution w
hich depends only on the Hamiltonian of the system. Strongly disordered in
teracting systems violate this\; i.e. they retain memories of initial stat
es at long times and do not thermalize: a phenomenon known as many body lo
calization. To understand this behaviour\, which is seen experimentally\,
we construct a non equilibrium field theory which can describe quantum dyn
amics starting from arbitrary initial conditions (Textbook versions requir
e initial system to be in thermal equilibrium). Our new formalism provides
exact universal answers for long time memory retention in disordered non-
interacting systems. We will also show that weakly interacting systems ret
ain finite memory of initial states. However\, the long time effective des
cription of the interacting system is widely different from that of the no
n-interacting one.\n\nhttps://indico.tifr.res.in/indico/conferenceDisplay.
py?confId=7354
LOCATION: AG69
URL:https://indico.tifr.res.in/indico/conferenceDisplay.py?confId=7354
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