title: Quantum open system theory: bipartite aspects.
abstract: We demonstrate in straightforward calculations that even under ideally weak noise the relaxation of bipartite open quantum systems contains elements not previously encountered in quantum noise physics. While additivity of decay rates is known to be generic for decoherence of a single system, we demonstrate that it breaks down for bipartite coherence of even the simplest composite systems.
authors.affiliation: Rochester Theory Center for Optical Science and Engineering, and Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627, USA. ting@pas.rochester.edu
authors.forename: T
authors.initials: T
authors.lastname: Yu
authors.forename: J H
authors.initials: JH
authors.lastname: Eberly