Spin gases as microscopic models for non-Markovian decoherence
Hartmann, L. (Universität Innsbruck. Institut für Theoretische Physik)
Calsamiglia, John (Universitat Autònoma de Barcelona. Departament de Física)
Dür, W. (Universität Innsbruck. Institut für Theoretische Physik)
Briegel, Hans J. (Universität Innsbruck. Institut für Theoretische Physik)
American Physical Society

Date:	2005
Abstract:	We analyze a microscopic decoherence model in which the total system is described as a spin gas. A spin gas consists of N classically moving particles with additional, interacting quantum degrees of freedom (e. g. , spins). For various multipartite entangled probe states, we analyze the decoherence induced by interactions between the probe and environmental spins in such spin gases. We can treat mesoscopic environments (≈105 particles). We present results for a lattice gas, which could be realized by neutral atoms hopping in an optical lattice, and show the effects of non-Markovian and correlated noise, as well as finite-size effects.
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Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Published in:	Physical review. A, Vol. 72, Issue 5 (November 2005) , p. 052107-1-052107-5, ISSN 1050-2947

DOI: 10.1103/PhysRevA.72.052107

5 p, 152.5 KB

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