Exponentially long lifetime of universal quasi-steady states in topological Floquet pumps

Autor: Tobias Gulden, Erez Berg, Mark S. Rudner, Netanel H. Lindner
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: SciPost Physics, Vol 9, Iss 1, p 015 (2020)
Druh dokumentu: article
ISSN: 2542-4653
DOI: 10.21468/SciPostPhys.9.1.015
Popis: We investigate a mechanism to transiently stabilize topological phenomena in long-lived quasi-steady states of isolated quantum many-body systems driven at low frequencies. We obtain an analytical bound for the lifetime of the quasi-steady states which is exponentially large in the inverse driving frequency. Within this lifetime, the quasi-steady state is characterized by maximum entropy subject to the constraint of fixed number of particles in the system's Floquet-Bloch bands. In such a state, all the non-universal properties of these bands are washed out, hence only the topological properties persist.
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