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

Data: 2005
Resum: 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.
Drets: Tots els drets reservats.
Llengua: Anglès
Document: article ; recerca ; publishedVersion
Publicat a: 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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