title: Semiclassical theory for decay and fragmentation processes in chaotic quantum systems.
abstract: We consider quantum decay and photofragmentation processes in open chaotic systems in the semiclassical limit. We devise a semiclassical approach which allows us to consistently calculate quantum corrections to the classical decay to high order in an expansion in the inverse Heisenberg time. We present results for systems with and without time-reversal symmetry, as well as for the symplectic case, and extend recent results to nonlocalized initial states. We further analyze related photodissociation and photoionization phenomena and semiclassically compute cross-section correlations, including their Ehrenfest-time dependence.
authors.affiliation: Institut für Theoretische Physik, Universität Regensburg, D-93040 Regensburg, Germany.
authors.forename: Martha
authors.initials: M
authors.lastname: Gutiérrez
authors.forename: Daniel
authors.initials: D
authors.lastname: Waltner
authors.forename: Jack
authors.initials: J
authors.lastname: Kuipers
authors.forename: Klaus
authors.initials: K
authors.lastname: Richter