Deterministic controlled bidirectional remote state preparation in dissipative environments  

作　　者：Jun-Rong Gu Jin-Ming Liu 

机构地区：[1]State Key Laboratory of Precision Spectroscopy,School of Physics and Electronic Science,East China Normal University,Shanghai 200241,China

出　　处：《Communications in Theoretical Physics》2022年第7期72-83,共12页理论物理通讯（英文版）

基　　金：supported by the National Natural Science Foundation of China under Grant Nos.91950112 and11174081;the Shanghai Pujiang Program under Grant No.20PJ1403400;the National Key Research and Development Program of China under Grant No.2016YFB0501601。

摘　　要：It is a significant subject to explore effective quantum communication protocol and enhance the efficiency of the transmission process in noisy environments. In this paper, we investigate the bidirectional controlled remote preparation of an arbitrary single-qubit state in the presence of dissipative environments by using two EPR states as the entanglement source. We first construct the quantum circuit of our scheme by means of unitary matrix decomposition procedure, then the effects of the Markovian and non-Markovian environmental noises acting on the EPR states are considered through the analytical derivation and numerical calculations of the corresponding average fidelity. Moreover, we adopt two methods of weak measurement reversal(WMR) and detuning modulation to improve the average fidelity. Our results show that the average fidelity can be remarkably enhanced under appropriate conditions of the WMR strength and the detuning. Compared with the average fidelity behaviors in dissipative environments, it is also shown that the two methods for fidelity improvement are more efficient in the non-Markovian regime than in the Markovian regime.

关 键 词：remote state preparation non-Markovian noise FIDELITY weak measurement reversal 

分 类 号：O413[理学—理论物理]