Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment

doi:10.1088/1674-1056/19/6/060304

中国物理B ›› 2010, Vol. 19 ›› Issue (6): 60304-060304.doi: 10.1088/1674-1056/19/6/060304

Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment

嵇英华¹, 胡菊菊²

(1)College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, China; (2)College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China;School of Optical-Electrical Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

收稿日期:2009-09-26 出版日期:2010-06-15 发布日期:2010-06-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No.~10864002).

Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment

Ji Ying-Hua(嵇英华)^a)b)† and Hu Ju-Ju(胡菊菊)^a)c)

^a College of Physics and Communication Electronics, Jiangxi Normal University, Nanchang 330022, China; ^b Key Laboratory of Optoelectronic and Telecommunication of Jiangxi, Nanchang 330022, China; ^c School of Optical-Electrical Information and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

Received:2009-09-26 Online:2010-06-15 Published:2010-06-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No.~10864002).

摘要/Abstract

摘要： The sudden death of entanglement is investigated for the non-Markovian dynamic process of a pair of interacting flux qubits under a thermal bath. The results show that, for initially two-qubit entangled states, entanglement sudden death (ESD) always happens in the thermal reservoir, where its appearance strongly depends on the environment. In particular, ESD of the qubits occurs more easily for the non-Markovian process than for the Markovian one.

Abstract: The sudden death of entanglement is investigated for the non-Markovian dynamic process of a pair of interacting flux qubits under a thermal bath. The results show that, for initially two-qubit entangled states, entanglement sudden death (ESD) always happens in the thermal reservoir, where its appearance strongly depends on the environment. In particular, ESD of the qubits occurs more easily for the non-Markovian process than for the Markovian one.

Key words: entanglement, coupled qubits, non-Markovian process, concurrence

中图分类号: (Entanglement and quantum nonlocality)

03.65.Ud

03.67.Mn (Entanglement measures, witnesses, and other characterizations) 03.67.Lx (Quantum computation architectures and implementations)

嵇英华, 胡菊菊. Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment[J]. 中国物理B, 2010, 19(6): 60304-060304.

Ji Ying-Hua(嵇英华) and Hu Ju-Ju(胡菊菊). Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment[J]. Chin. Phys. B, 2010, 19(6): 60304-060304.

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Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment

Entanglement and decoherence of coupled superconductor qubits in a non-Markovian environment

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