,Reversion of weak-measured quantum entanglement state

• 作 者: Shao-Jiang Du Yonggang Peng Hai-Ran Feng Feng Han Lian-Wu Yang Yu-Jun Zheng
• 机 构: Department of Physics and Information Engineering, Jining University, Qufu 273155, China“,”School of
• 出 处: 中国物理B（英文版）
• 发表日期: 2020年7期
• 关键词: quantum entanglement weak measurement reversion operation information gain and r

We theoretically study the reversible process of quantum entanglement state by means of weak measurement and corresponding reversible operation.We present a protocol of the reversion operation in two bodies based on the theory of reversion of single photon and then expend it in quantum communication channels.The theoretical results demonstrate that the protocol does not break the information transmission after a weak measurement and a reversible measurement with the subsequent process in the transmission path.It can reverse the perturbed entanglement intensity evolution to its original state.Under the condition of different weak measurement intensity the protocol can reverse the perturbed quantum entanglement system perfectly.In the process we can get the classical information described by information gain from the quantum system through weak measurement operation.On the other hand,in order to realize complete reversibility,the classical information of the quantum entanglement system must obey a limited range we present in this paper in the reverseprocess.