Effect of partial-collapse measurement on quantum entanglement in noninertial frames

被引:0
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作者
Xiang-Ping Liao
Wei Wen
Man-Sheng Rong
Mao-Fa Fang
机构
[1] Hunan University of Technology,College of Science
[2] Hunan Normal University,College of Physics and Information Science
来源
Quantum Information Processing | 2020年 / 19卷
关键词
Quantum entanglement; Partial-collapse measurement; Noninertial frames; Noise channels;
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摘要
An efficient method is proposed to improve two-qubit entanglement under the action of noise channel in noninertial frames by using partial-collapse measurement. We focus on the influence of partial-collapse measurement on entanglement for different noise channels in noninertial frames. It is shown that entanglement can be enhanced greatly for phase-flip, phase-damping, depolarizing and amplitude-damping channels. We obtain the optimal concurrence for the four noise channels, respectively. Moreover, ’entanglement sudden death’ can be avoided for amplitude-damping environment. Our work provides a novel method to improve quantum entanglement under both noise environment and Unruh effect and exhibits the ability of partial-collapse measurement as an important technique in relativistic quantum information.
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