0506208v1

related topics
{time, decoherence, evolution}
{energy, state, states}
{entanglement, phys, rev}
{state, states, entangled}
{temperature, thermal, energy}
{classical, space, random}
{light, field, probe}
{state, algorithm, problem}
{time, wave, function}
{cos, sin, state}
{states, state, optimal}
{trap, ion, state}
{vol, operators, histories}

Spin gases as microscopic models for non-Markovian decoherence

L. Hartmann, J. Calsamiglia, W. Dür, H. J. Briegel

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 (10^5 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.

oai_identifier:
oai:arXiv.org:quant-ph/0506208
categories:
quant-ph
comments:
4 pages, 4 figures
doi:
10.1103/PhysRevA.72.052107
arxiv_id:
quant-ph/0506208
journal_ref:
Phys. Rev. A 72, 052107 (2005)
created:
2005-06-24

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