title: Classical decays in decoherent quantum maps.
abstract: The linear entropy and the Loschmidt echo have proved to be of interest recently in the context of quantum information and of the quantum to classical transitions. We study the asymptotic long-time behavior of these quantities for open quantum maps and relate the decays to the eigenvalues of a coarse-grained superoperator. In specific ranges of coarse graining, and for chaotic maps, these decay rates are given by the Ruelle-Pollicott resonances of the classical map.
authors.affiliation: Departamento de Física, Comisión Nacional de Energía Atómica, Avenida del Libertador 8250 (1429), Buenos Aires, Argentina. garciama@tandar.cnea.gov.ar
authors.forename: Ignacio
authors.initials: I
authors.lastname: García-Mata
authors.forename: Marcos
authors.initials: M
authors.lastname: Saraceno
authors.forename: María Elena
authors.initials: ME
authors.lastname: Spina