Disentanglement by Dissipative Open System Dynamics

Details Disentanglement by Dissipative Open System Dynamics Disentanglement by Dissipative Open System Dynamics

2003-12-10

arxiv.org/abs/quant-ph/0312099v1

Physics

Quantum Physics

Paper in conjunction with and following on from P.J. Dodd and J.J. Halliwell: quant-ph/0312068

Scientific paper

10.1103/PhysRevA.69.052106

This paper investigates disentanglement as a result of evolution according to a class of master equations which include dissipation and interparticle interactions. Generalizing an earlier result of Di\'{o}si, the time taken for complete disentanglement is calculated (i.e. for disentanglement from any other system). The dynamics of two harmonically coupled oscillators is solved in order to study the competing effects of environmental noise and interparticle coupling on disentanglement. An argument based on separability conditions for gaussian states is used to arrive at a set of conditions on the couplings sufficient for all initial states to disentangle for good after a finite time.

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