dorsal/arxiv
View SchemaQuantum measurement and decoherence
| Authors | G. W. Ford, J. T. Lewis, R. F. O'Connell |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0301055 |
| URL | https://arxiv.org/abs/quant-ph/0301055 |
| DOI | 10.1103/PhysRevA.64.032101 |
| Journal | Phys.Rev.A 64, 032101(2001) |
Abstract
Distribution functions defined in accord with the quantum theory of measurement are combined with results obtained from the quantum Langevin equation to discuss decoherence in quantum Brownian motion. Closed form expressions for wave packet spreading and the attenuation of coherence of a pair of wave packets are obtained. The results are exact within the context of linear passive dissipation. It is shown that, contrary to widely accepted current belief, decoherence can occur at high temperature in the absence of dissipation. Expressions for the decoherence time with and without dissipation are obtained that differ from those appearing in earlier discussions.
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"abstract": "Distribution functions defined in accord with the quantum theory of\nmeasurement are combined with results obtained from the quantum Langevin\nequation to discuss decoherence in quantum Brownian motion. Closed form\nexpressions for wave packet spreading and the attenuation of coherence of a\npair of wave packets are obtained. The results are exact within the context of\nlinear passive dissipation. It is shown that, contrary to widely accepted\ncurrent belief, decoherence can occur at high temperature in the absence of\ndissipation. Expressions for the decoherence time with and without dissipation\nare obtained that differ from those appearing in earlier discussions.",
"arxiv_id": "quant-ph/0301055",
"authors": [
"G. W. Ford",
"J. T. Lewis",
"R. F. O\u0027Connell"
],
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"quant-ph"
],
"doi": "10.1103/PhysRevA.64.032101",
"journal_ref": "Phys.Rev.A 64, 032101(2001)",
"title": "Quantum measurement and decoherence",
"url": "https://arxiv.org/abs/quant-ph/0301055"
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