Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series SEM-LPTHE
Subjects cond-mat.stat-mech
Date Friday 2 February 2018
Time 11:00
Institute LPTHE
Seminar Room Bibliothèque
Speaker's Last Name Ioffe
Speaker's First Name Lev
Speaker's Email Address
Speaker's Institution LPTHE
Title Non-ergodicity in many body systems and disordered random graphs; application to the phase diagram of Josephson junction chain
Abstract At very high disorder a generic closed quantum systems becomes completely localized. I argue that this (may body) localization is preempted by a wide regime of non-ergodic behavior that displays a number of unusual properties. A good system to study these effects are Josephson junction arrays in a somewhat unusual regime. The toy model of disordered many body systems that capture the physics of many body systems is provided by random regular graphs. I will sketch a simplified analytical theory of the non-ergodic phase in this models, compare the results with the direct numerical simulations and summarize the conclusions relevant for physical many body systems.
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