dorsal/arxiv
View SchemaEntanglement and decoherence in spin gases
| Authors | J. Calsamiglia, L. Hartmann, W. Dür, H. -J. Briegel |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0502017 |
| URL | https://arxiv.org/abs/quant-ph/0502017 |
Abstract
We study the dynamics of entanglement in spin gases. A spin gas consists of a (large) number of interacting particles whose random motion is described classically while their internal degrees of freedom are described quantum-mechanically. We determine the entanglement that occurs naturally in such systems for specific types of quantum interactions. At the same time, these systems provide microscopic models for non--Markovian decoherence: the interaction of a group of particles with other particles belonging to a background gas are treated exactly, and differences between collective and non--collective decoherence processes are studied. We give quantitative results for the Boltzmann gas and also for a lattice gas, which could be realized by neutral atoms hopping in an optical lattice. These models can be simulated efficiently for systems of mesoscopic sizes (N ~ 10^5).
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"abstract": "We study the dynamics of entanglement in spin gases. A spin gas consists of a\n(large) number of interacting particles whose random motion is described\nclassically while their internal degrees of freedom are described\nquantum-mechanically. We determine the entanglement that occurs naturally in\nsuch systems for specific types of quantum interactions. At the same time,\nthese systems provide microscopic models for non--Markovian decoherence: the\ninteraction of a group of particles with other particles belonging to a\nbackground gas are treated exactly, and differences between collective and\nnon--collective decoherence processes are studied. We give quantitative results\nfor the Boltzmann gas and also for a lattice gas, which could be realized by\nneutral atoms hopping in an optical lattice. These models can be simulated\nefficiently for systems of mesoscopic sizes (N ~ 10^5).",
"arxiv_id": "quant-ph/0502017",
"authors": [
"J. Calsamiglia",
"L. Hartmann",
"W. D\u00fcr",
"H. -J. Briegel"
],
"categories": [
"quant-ph"
],
"title": "Entanglement and decoherence in spin gases",
"url": "https://arxiv.org/abs/quant-ph/0502017"
},
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