2012/04/30 by Angelo Russomanno, Alessandro Silva, Giuseppe E. Santoro · 1 citation
Physics and Astronomy · #cond-mat.stat-mech #quant-ph
paper · pdf · doi:10.1103/physrevlett.109.257201
published as Phys. Rev. Lett. 109, 257201 (2012) · 5 pages, 3 figures, supplementary material, Accepted by PRL
arxiv created 2012/11/16 · arxiv updated 2015/04/29
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 non-integrable systems are discussed.