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Logarithmically slow relaxation in quasi-periodically driven random spin chains We

Philipp Dumitrescu, University of Texas at Austin USA

21.12.2017 at 12:00 

We study the dynamics of a disordered, interacting spin-chain subject to a drive which is quasi-periodic in time. Although thermalizing at long times, the system exhibits an exponentially long-lived glassy regime. This glassy regime is characterized by a logarithmically slow growth of entanglement and decay of correlations. The slow relaxation enables new metastable dynamical phases, exemplified by a “time quasi -crystal”. In contrast to pre-thermal phases of Floquet systems, an analytic high-frequency expansion strictly breaks down and fails to give an effective static description of this glassy relaxation.

B 134, Theresienstr. 39