Work

Periodic Steady Regime and Interference in a Periodically Driven Quantum System

Year: 2012

Type: article

Abstract: 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.

Source: Physical Review Letters

DOI: 10.1103/physrevlett.109.257201

Authors: Angelo Russomanno, Alessandro Silva, Giuseppe E. Santoro

Institutions: Scuola Internazionale Superiore di Studi Avanzati, Istituto Officina dei Materiali, The Abdus Salam International Centre for Theoretical Physics (ICTP)

Language: English

Topic: Quantum many-body systems

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Ministero dell’Istruzione, dell’Università e della Ricerca

Awards: Understanding nanofriction and dissipation across phase transitions, Governing ultrafast the conductivity of correlated materials, EFFETTI DI SPIN, DI NON EQUILIBRIO, E A MOLTI CORPI IN NANOCONTATTI ATOMICI E MOLECOLARI