Dynamics of entanglement under decoherence in noninertial frames

doi:10.1088/1674-1056/23/2/020310

中国物理B ›› 2014, Vol. 23 ›› Issue (2): 20310-020310.doi: 10.1088/1674-1056/23/2/020310

Dynamics of entanglement under decoherence in noninertial frames

石甲栋^a, 吴韬^{a b}, 宋学科^a, 叶柳^a

a School of Physics & Material Science, Anhui University, Hefei 230039, China;
b School of Physics & Electronics Science, Fuyang Normal College, Fuyang 236037, China

收稿日期:2013-06-09 修回日期:2013-07-17 出版日期:2013-12-12 发布日期:2013-12-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074002 and 61275119), the Doctoral Science Foundation of the Ministry of Education of China (Grant No. 20103401110003), and the Natural Science Research Project of the Education Department of Anhui Province, China (Grant Nos. KJ2013A205, KJ2011ZD07, and KJ2012Z309).

Dynamics of entanglement under decoherence in noninertial frames

Shi Jia-Dong (石甲栋)^a, Wu Tao (吴韬)^{a b}, Song Xue-Ke (宋学科)^a, Ye Liu (叶柳)^a

a School of Physics & Material Science, Anhui University, Hefei 230039, China;
b School of Physics & Electronics Science, Fuyang Normal College, Fuyang 236037, China

Received:2013-06-09 Revised:2013-07-17 Online:2013-12-12 Published:2013-12-12
Contact: Ye Liu E-mail:yeliu@ahu.edu.cn
About author:03.65.Pp; 03.65.Yz; 03.67.Mn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11074002 and 61275119), the Doctoral Science Foundation of the Ministry of Education of China (Grant No. 20103401110003), and the Natural Science Research Project of the Education Department of Anhui Province, China (Grant Nos. KJ2013A205, KJ2011ZD07, and KJ2012Z309).

摘要/Abstract

摘要： In this paper, we investigate the entanglement dynamics of a two-qubit entangled state coupled with its noisy environment, and plan to utilize weak measurement and quantum reversal measurement to study the entanglement dynamics under different decoherence channels in noninertial frames. Through the calculations and analyses, it is shown that the weak measurement can prevent entanglement from coupling to the amplitude damping channel, while the system is under the phase damping and flip channels. This protection protocol cannot prevent entanglement but will accelerate the death of entanglement. In addition, if the system is in the noninertial reference frame, then the effect of weak measurement will be weakened for the amplitude damping channel. Nevertheless, for other decoherence channels, the Unruh effect does not affect the quantum weak measurement, the only exception is that the maximum value of entanglement is reduced to √2/2 of the original value in the inertial frames.

关键词: decoherence, noninertial frames, entanglement protection protocols

Abstract: In this paper, we investigate the entanglement dynamics of a two-qubit entangled state coupled with its noisy environment, and plan to utilize weak measurement and quantum reversal measurement to study the entanglement dynamics under different decoherence channels in noninertial frames. Through the calculations and analyses, it is shown that the weak measurement can prevent entanglement from coupling to the amplitude damping channel, while the system is under the phase damping and flip channels. This protection protocol cannot prevent entanglement but will accelerate the death of entanglement. In addition, if the system is in the noninertial reference frame, then the effect of weak measurement will be weakened for the amplitude damping channel. Nevertheless, for other decoherence channels, the Unruh effect does not affect the quantum weak measurement, the only exception is that the maximum value of entanglement is reduced to √2/2 of the original value in the inertial frames.

Key words: decoherence, noninertial frames, entanglement protection protocols

中图分类号:

03.65.Pp

03.65.Yz (Decoherence; open systems; quantum statistical methods) 03.67.Mn (Entanglement measures, witnesses, and other characterizations)

石甲栋, 吴韬, 宋学科, 叶柳. Dynamics of entanglement under decoherence in noninertial frames[J]. 中国物理B, 2014, 23(2): 20310-020310.

Shi Jia-Dong (石甲栋), Wu Tao (吴韬), Song Xue-Ke (宋学科), Ye Liu (叶柳). Dynamics of entanglement under decoherence in noninertial frames[J]. Chin. Phys. B, 2014, 23(2): 20310-020310.

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Dynamics of entanglement under decoherence in noninertial frames

Dynamics of entanglement under decoherence in noninertial frames

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