dorsal/arxiv
View SchemaExact decoherence to pointer states in free open quantum systems is universal
| Authors | J. Eisert |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0311022 |
| URL | https://arxiv.org/abs/quant-ph/0311022 |
| DOI | 10.1103/PhysRevLett.92.210401 |
| Journal | Phys. Rev. Lett. 92, 210401 (2004) |
Abstract
In this paper it is shown that exact decoherence to minimal uncertainty Gaussian pointer states is generic for free quantum particles coupled to a heat bath. More specifically, the paper is concerned with damped free particles linearly coupled under product initial conditions to a heat bath at arbitrary temperature, with arbitrary coupling strength and spectral densities covering the Ohmic, subohmic, and supraohmic regime. Then it is true that there exists a time t_c such that for times t>t_c the state can always be exactly represented as a mixture (convex combination) of particular minimal uncertainty Gaussian states, regardless of and independent from the initial state. This exact `localisation' is hence not a feature specific to high temperatures and weak damping limit, but is rather a generic property of damped free particles.
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"abstract": "In this paper it is shown that exact decoherence to minimal uncertainty\nGaussian pointer states is generic for free quantum particles coupled to a heat\nbath. More specifically, the paper is concerned with damped free particles\nlinearly coupled under product initial conditions to a heat bath at arbitrary\ntemperature, with arbitrary coupling strength and spectral densities covering\nthe Ohmic, subohmic, and supraohmic regime. Then it is true that there exists a\ntime t_c such that for times t\u003et_c the state can always be exactly represented\nas a mixture (convex combination) of particular minimal uncertainty Gaussian\nstates, regardless of and independent from the initial state. This exact\n`localisation\u0027 is hence not a feature specific to high temperatures and weak\ndamping limit, but is rather a generic property of damped free particles.",
"arxiv_id": "quant-ph/0311022",
"authors": [
"J. Eisert"
],
"categories": [
"quant-ph",
"cond-mat",
"gr-qc"
],
"doi": "10.1103/PhysRevLett.92.210401",
"journal_ref": "Phys. Rev. Lett. 92, 210401 (2004)",
"title": "Exact decoherence to pointer states in free open quantum systems is universal",
"url": "https://arxiv.org/abs/quant-ph/0311022"
},
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