激光与光电子学进展, 2016, 53 (3): 032701, 网络出版: 2016-03-04
弱测量对多体簇态纠缠和保真度的保护
Protecting Entanglement and Fidelity of Cluster States by Weak Measurement and Reversal
摘要
研究了在振幅阻尼通道中,利用弱测量来保护簇态的纠缠和保真度。通过前置弱测量和后置弱测量反转操作,系统的退相干能够得到有效抑制,保真度明显提高。另外,系统的纠缠和保真度演化与弱测量强度P 的取值有关,在选择适当的P 值时,系统的纠缠和保真度能得到最佳的保护。
Abstract
The protection of entanglement and fidelity of cluster states under amplitude damping decoherence by means of weak measurement is investigated. Employing the prior weak measurement and post weak measurement reversal, the decoherence of system can be prohibited effectively, and the fidelity is improved obviously. Besides, the evolution of entanglement and fidelity are dependent on the weak measurement strength P. By choosing some proper values of P, the entanglement and fidelity can be protected optimally.
黄江, 谢钦. 弱测量对多体簇态纠缠和保真度的保护[J]. 激光与光电子学进展, 2016, 53(3): 032701. Huang Jiang, Xie Qin. Protecting Entanglement and Fidelity of Cluster States by Weak Measurement and Reversal[J]. Laser & Optoelectronics Progress, 2016, 53(3): 032701.