dorsal/arxiv
View SchemaEntanglement Evolution in the Presence of Decoherence
| Authors | Jin Wang, Herman Batelaan, Jeremy Podany, Anthony F. Starace |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0503116 |
| URL | https://arxiv.org/abs/quant-ph/0503116 |
| DOI | 10.1088/0953-4075/39/21/001 |
| Journal | J.Phys. B 39, 4343-4353 (2006) |
Abstract
The entanglement of two qubits, each defined as an effective two-level, spin 1/2 system, is investigated for the case that the qubits interact via a Heisenberg XY interaction and are subject to decoherence due to population relaxation and thermal effects. For zero temperature, the time dependent concurrence is studied analytically and numerically for some typical initial states, including a separable (unentangled) initial state. An analytical formula for non-zero steady state concurrence is found for any initial state, and optimal parameter values for maximizing steady state concurrence are given. The steady state concurrence is found analytically to remain non-zero for low, finite temperatures. We also identify the contributions of global and local coherence to the steady state entanglement.
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"abstract": "The entanglement of two qubits, each defined as an effective two-level, spin\n1/2 system, is investigated for the case that the qubits interact via a\nHeisenberg XY interaction and are subject to decoherence due to population\nrelaxation and thermal effects. For zero temperature, the time dependent\nconcurrence is studied analytically and numerically for some typical initial\nstates, including a separable (unentangled) initial state. An analytical\nformula for non-zero steady state concurrence is found for any initial state,\nand optimal parameter values for maximizing steady state concurrence are given.\nThe steady state concurrence is found analytically to remain non-zero for low,\nfinite temperatures. We also identify the contributions of global and local\ncoherence to the steady state entanglement.",
"arxiv_id": "quant-ph/0503116",
"authors": [
"Jin Wang",
"Herman Batelaan",
"Jeremy Podany",
"Anthony F. Starace"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/0953-4075/39/21/001",
"journal_ref": "J.Phys. B 39, 4343-4353 (2006)",
"title": "Entanglement Evolution in the Presence of Decoherence",
"url": "https://arxiv.org/abs/quant-ph/0503116"
},
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