dorsal/arxiv
View SchemaCompletely-Positive Non-Markovian Decoherence
| Authors | Jinhyoung Lee, Inbo Kim, Helen McAneney, M. S. Kim, Doyeol Ahn |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0403018 |
| URL | https://arxiv.org/abs/quant-ph/0403018 |
| DOI | 10.1103/PhysRevA.70.024301 |
| Journal | Phys. Rev. A 70, 024301 (2004) |
Abstract
We propose an effective Hamiltonian approach to investigate decoherence of a quantum system in a non-Markovian reservoir, naturally imposing the complete positivity on the reduced dynamics of the system. The formalism is based on the notion of an effective reservoir, i.e., certain collective degrees of freedom in the reservoir that are responsible for the decoherence. As examples for completely positive decoherence, we present three typical decoherence processes for a qubit such as dephasing, depolarizing, and amplitude-damping. The effects of the non-Markovian decoherence are compared to the Markovian decoherence.
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"abstract": "We propose an effective Hamiltonian approach to investigate decoherence of a\nquantum system in a non-Markovian reservoir, naturally imposing the complete\npositivity on the reduced dynamics of the system. The formalism is based on the\nnotion of an effective reservoir, i.e., certain collective degrees of freedom\nin the reservoir that are responsible for the decoherence. As examples for\ncompletely positive decoherence, we present three typical decoherence processes\nfor a qubit such as dephasing, depolarizing, and amplitude-damping. The effects\nof the non-Markovian decoherence are compared to the Markovian decoherence.",
"arxiv_id": "quant-ph/0403018",
"authors": [
"Jinhyoung Lee",
"Inbo Kim",
"Helen McAneney",
"M. S. Kim",
"Doyeol Ahn"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.70.024301",
"journal_ref": "Phys. Rev. A 70, 024301 (2004)",
"title": "Completely-Positive Non-Markovian Decoherence",
"url": "https://arxiv.org/abs/quant-ph/0403018"
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