Decoherence-free subspace and disentanglement dynamics for two qubits in a common non-Markovian squeezed reservoir

Journal Article · Sun Aug 15 00:00:00 EDT 2010 · Physical Review. A

DOI:https://doi.org/10.1103/PHYSREVA.82.022103· OSTI ID:21448430

Ali, Md Manirul ^[1]; Chen, Po-Wen ^[2]; Goan, Hsi-Sheng ^[2]

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1. Research Center for Applied Sciences, Academia Sinica, Taipei 11529, Taiwan (China)
2. Department of Physics and Center for Theoretical Sciences, National Taiwan University, Taipei 10617, Taiwan (China)

We study the non-Markovian entanglement dynamics of two qubits in a common squeezed bath. We see a remarkable difference between the non-Markovian entanglement dynamics and its Markovian counterpart. We show that a non-Markovian decoherence-free state is also decoherence free in the Markovian regime, but all the Markovian decoherence-free states are not necessarily decoherence free in the non-Markovian domain. We extend our calculation from a squeezed vacuum bath to a squeezed thermal bath, where we see the effect of finite bath temperatures on the entanglement dynamics.

• OSTI ID: 21448430
• Journal Information: Physical Review. A, Vol. 82, Issue 2; Other Information: DOI: 10.1103/PhysRevA.82.022103; (c) 2010 The American Physical Society; ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ENERGY LEVELS
MARKOV PROCESS
QUANTUM DECOHERENCE
QUANTUM ENTANGLEMENT
QUANTUM MECHANICS
QUANTUM STATES
QUBITS
INFORMATION
MECHANICS
QUANTUM INFORMATION
STOCHASTIC PROCESSES