Periodic steady regime and interference in a periodically driven quantum system
We study the coherent dynamics of a quantum many-body system subject to a time-periodic driving. We argue that in many cases, destructive interference in time makes most of the quantum averages time periodic, after an initial transient. We discuss in detail the case of a quantum Ising chain periodic...
Saved in:
| Published in | Physical review letters Vol. 109; no. 25; p. 257201 |
|---|---|
| Main Authors | , , |
| Format | Journal Article |
| Language | English |
| Published |
United States
17.12.2012
|
| Online Access | Get more information |
Cover
Loading…
| Summary: | We study the coherent dynamics of a quantum many-body system subject to a time-periodic driving. We argue that in many cases, destructive interference in time makes most of the quantum averages time periodic, after an initial transient. We discuss in detail the case of a quantum Ising chain periodically driven across the critical point, finding that, as a result of quantum coherence, the system never reaches an infinite temperature state. Floquet resonance effects are moreover observed in the frequency dependence of the various observables, which display a sequence of well-defined peaks or dips. Extensions to nonintegrable systems are discussed. |
|---|---|
| ISSN: | 1079-7114 |
| DOI: | 10.1103/physrevlett.109.257201 |