Jerzy Dajka et al 2007 J. Phys. A: Math. Theor. 40 F879 doi:10.1088/1751-8113/40/37/F01
Entanglement persistence in contact with the environment: exact results
FREE ARTICLEJerzy Dajka, Marcin Mierzejewski and Jerzy Łuczka
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The evolution of quantum entanglement of a pair of non-interacting qubits is studied for the case where one of them is non-dissipatively but dephasingly coupled to the environment. The reduced non-Markovian dynamics of the qubits is exact for an arbitrary strength of coupling to the environment and the arbitrary frequency spectrum of environment fluctuations. While for the subohmic and ohmic environments the entanglement diminishes, for the superohmic zero-temperature environment it survives for a long time.
- PACS
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03.65.Yz Decoherence; open systems; quantum statistical methods
03.67.Lx Quantum computation architectures and implementations
03.67.Mn Entanglement measures, witnesses, and other characterizations
- MSC
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94A15 Information theory, general (See also 62B10)
81P68 Quantum computation and quantum cryptography (See also 68Q05, 94A60)
- Subjects
- Dates
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Issue 37 (14 September 2007)
Received 1 August 2007
Published 29 August 2007
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Entanglement persistence in contact with the environment: exact results
Jerzy Dajka et al 2007 J. Phys. A: Math. Theor. 40 F879
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