dorsal/arxiv
View SchemaA Bell pair in a generic random matrix environment
| Authors | Carlos Pineda, Thomas H. Seligman |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0605169 |
| URL | https://arxiv.org/abs/quant-ph/0605169 |
| DOI | 10.1103/PhysRevA.75.012106 |
| Journal | Phys. Rev. A 75(1), 012106, (2007). |
Abstract
Two non-interacting qubits are coupled to an environment. Both coupling and environment are represented by random matrix ensembles. The initial state of the pair is a Bell state, though we also consider arbitrary pure states. Decoherence of the pair is evaluated analytically in terms of purity; Monte Carlo calculations confirm these results and also yield the concurrence of the pair. Entanglement within the pair accelerates decoherence. Numerics display the relation between concurrence and purity known for Werner states, allowing us to give a formula for concurrence decay.
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"abstract": "Two non-interacting qubits are coupled to an environment. Both coupling and\nenvironment are represented by random matrix ensembles. The initial state of\nthe pair is a Bell state, though we also consider arbitrary pure states.\nDecoherence of the pair is evaluated analytically in terms of purity; Monte\nCarlo calculations confirm these results and also yield the concurrence of the\npair. Entanglement within the pair accelerates decoherence. Numerics display\nthe relation between concurrence and purity known for Werner states, allowing\nus to give a formula for concurrence decay.",
"arxiv_id": "quant-ph/0605169",
"authors": [
"Carlos Pineda",
"Thomas H. Seligman"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.75.012106",
"journal_ref": "Phys. Rev. A 75(1), 012106, (2007).",
"title": "A Bell pair in a generic random matrix environment",
"url": "https://arxiv.org/abs/quant-ph/0605169"
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