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- Title
Effect of partial-collapse measurement on quantum entanglement in noninertial frames.
- Authors
Liao, Xiang-Ping; Wen, Wei; Rong, Man-Sheng; Fang, Mao-Fa
- Abstract
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.
- Subjects
QUANTUM entanglement; QUANTUM measurement; UNRUH effect; SUDDEN death; NOISE
- Publication
Quantum Information Processing, 2020, Vol 19, Issue 3, p1
- ISSN
1570-0755
- Publication type
Article
- DOI
10.1007/s11128-020-2600-3