dorsal/arxiv
View SchemaQuantifying decoherence in continuous variable systems
| Authors | A. Serafini, M. G. A. Paris, F. Illuminati, S. De Siena |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0501173 |
| URL | https://arxiv.org/abs/quant-ph/0501173 |
| DOI | 10.1088/1464-4266/7/4/R01 |
| Journal | J. Opt. B: Quantum Semiclass. Opt. 7, R19 (2005) |
Abstract
We present a detailed report on the decoherence of quantum states of continuous variable systems under the action of a quantum optical master equation resulting from the interaction with general Gaussian uncorrelated environments. The rate of decoherence is quantified by relating it to the decay rates of various, complementary measures of the quantum nature of a state, such as the purity, some nonclassicality indicators in phase space and, for two-mode states, entanglement measures and total correlations between the modes. Different sets of physically relevant initial configurations are considered, including one- and two-mode Gaussian states, number states, and coherent superpositions. Our analysis shows that, generally, the use of initially squeezed configurations does not help to preserve the coherence of Gaussian states, whereas it can be effective in protecting coherent superpositions of both number states and Gaussian wave packets.
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"abstract": "We present a detailed report on the decoherence of quantum states of\ncontinuous variable systems under the action of a quantum optical master\nequation resulting from the interaction with general Gaussian uncorrelated\nenvironments. The rate of decoherence is quantified by relating it to the decay\nrates of various, complementary measures of the quantum nature of a state, such\nas the purity, some nonclassicality indicators in phase space and, for two-mode\nstates, entanglement measures and total correlations between the modes.\nDifferent sets of physically relevant initial configurations are considered,\nincluding one- and two-mode Gaussian states, number states, and coherent\nsuperpositions. Our analysis shows that, generally, the use of initially\nsqueezed configurations does not help to preserve the coherence of Gaussian\nstates, whereas it can be effective in protecting coherent superpositions of\nboth number states and Gaussian wave packets.",
"arxiv_id": "quant-ph/0501173",
"authors": [
"A. Serafini",
"M. G. A. Paris",
"F. Illuminati",
"S. De Siena"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1464-4266/7/4/R01",
"journal_ref": "J. Opt. B: Quantum Semiclass. Opt. 7, R19 (2005)",
"title": "Quantifying decoherence in continuous variable systems",
"url": "https://arxiv.org/abs/quant-ph/0501173"
},
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