title: Temperature crossover of decoherence rates in chaotic and regular bath dynamics.
abstract: The effect of chaotic bath dynamics on the decoherence of a quantum system is examined for the vibrational degrees of freedom of a diatomic molecule in a realistic, constant temperature collisional bath. As an example, the specific case of I(2) in liquid xenon is examined as a function of temperature, and the results compared with an integrable xenon bath. A crossover in behavior is found: The integrable bath induces more decoherence at low bath temperatures than does the chaotic bath, whereas the opposite is the case at the higher bath temperatures. These results, verifying a conjecture due to Wilkie, shed light on the differing views of the effect of chaotic dynamics on system decoherence.
authors.affiliation: Instituto de Física Fundamental (IFF-CSIC), Serrano 123, 28006 Madrid, Spain.
authors.forename: A S
authors.initials: AS
authors.lastname: Sanz
authors.forename: Y
authors.initials: Y
authors.lastname: Elran
authors.forename: P
authors.initials: P
authors.lastname: Brumer