dorsal/arxiv
View SchemaDecoherence induced by a phase-damping reservoir
| Authors | R. M. Angelo, E. S. Cardoso, K. Furuya |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0603109 |
| URL | https://arxiv.org/abs/quant-ph/0603109 |
| DOI | 10.1103/PhysRevA.73.062107 |
| Journal | Physical Review A 73, 062107 (2006) |
Abstract
A phase damping reservoir composed by $N$-bosons coupled to a system of interest through a cross-Kerr interaction is proposed and its effects on quantum superpo sitions are investigated. By means of analytical calculations we show that: i-) the reservoir induces a Gaussian decay of quantum coherences, and ii-) the inher ent incommensurate character of the spectral distribution yields irreversibility . A state-independent decoherence time and a master equation are both derived an alytically. These results, which have been extended for the thermodynamic limit, show that nondissipative decoherence can be suitably contemplated within the EI D approach. Finally, it is shown that the same mechanism yielding decoherence ar e also responsible for inducing dynamical disentanglement.
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"abstract": "A phase damping reservoir composed by $N$-bosons coupled to a system of\ninterest through a cross-Kerr interaction is proposed and its effects on\nquantum superpo sitions are investigated. By means of analytical calculations\nwe show that: i-) the reservoir induces a Gaussian decay of quantum coherences,\nand ii-) the inher ent incommensurate character of the spectral distribution\nyields irreversibility . A state-independent decoherence time and a master\nequation are both derived an alytically. These results, which have been\nextended for the thermodynamic limit, show that nondissipative decoherence can\nbe suitably contemplated within the EI D approach. Finally, it is shown that\nthe same mechanism yielding decoherence ar e also responsible for inducing\ndynamical disentanglement.",
"arxiv_id": "quant-ph/0603109",
"authors": [
"R. M. Angelo",
"E. S. Cardoso",
"K. Furuya"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.73.062107",
"journal_ref": "Physical Review A 73, 062107 (2006)",
"title": "Decoherence induced by a phase-damping reservoir",
"url": "https://arxiv.org/abs/quant-ph/0603109"
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