Dynamics of entanglement under decoherence in noninertial frames

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

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.

Keywords: decoherence noninertial frames entanglement protection protocols

Received: 09 June 2013
Revised: 17 July 2013
Accepted manuscript online:

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

Fund: 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).

Corresponding Authors: Ye Liu
E-mail: yeliu@ahu.edu.cn

About author: 03.65.Pp; 03.65.Yz; 03.67.Mn

Cite this article:

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 2014 Chin. Phys. B 23 020310

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Dynamics of entanglement under decoherence in noninertial frames

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