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Title: Mechanism of entanglement preservation
Authors: Tong, Q.-J.
An, J.-H. 
Luo, H.-G.
Oh, C.H. 
Issue Date: 24-May-2010
Citation: Tong, Q.-J., An, J.-H., Luo, H.-G., Oh, C.H. (2010-05-24). Mechanism of entanglement preservation. Physical Review A - Atomic, Molecular, and Optical Physics 81 (5) : -. ScholarBank@NUS Repository.
Abstract: We study the entanglement preservation of two qubits locally interacting with their reservoirs. We show that the existence of a bound state of the qubit and its reservoir and the non-Markovian effect are two essential ingredients and their interplay plays a crucial role in preserving the entanglement in the steady state. When the non-Markovian effect is neglected, the entanglement sudden death (ESD) is reproduced. On the other hand, when the non-Markovian is significantly strong but the bound state is absent, the phenomenon of the ESD and its revival is recovered. Our formulation presents a unified picture about the entanglement preservation and provides a clear clue on how to preserve the entanglement in quantum information processing. © 2010 The American Physical Society.
Source Title: Physical Review A - Atomic, Molecular, and Optical Physics
ISSN: 10502947
DOI: 10.1103/PhysRevA.81.052330
Appears in Collections:Staff Publications

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