Controlling transfer of quantum correlations among bi-partitions of a composite quantum system by combining different noisy environments

作     者：张修兴 李福利 

作者机构：Department of Applied PhysicsXi'an Jiaotong University 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2011年第20卷第11期

页      面：53-66页

核心收录：

学科分类：0711[理学-系统科学] 07[理学] 08[工学] 070105[理学-运筹学与控制论] 070201[理学-理论物理] 081101[工学-控制理论与控制工程] 071101[理学-系统理论] 0811[工学-控制科学与工程] 0701[理学-数学] 0702[理学-物理学] 

基　　金：supported by the National Basic Research Program of China(Grant No.2010CB923102) the Special Prophase Project on the National Basic Research Program of China(Grant No.2011CB311807) the National Natural Science Foundation of China(Grand No.11074199) 

主　　题：quantum correlation noisy environment 

摘      要：The correlation dynamics are investigated for various bi-partitions of a composite quantum system consisting of two qubits and two independent and non-identical noisy environments. The two qubits have no direct interaction with each other and locally interact with their environments. Classical and quantum correlations including the entanglement are initially prepared only between the two qubits. We find that contrary to the identical noisy environment case, the quantum correlation transfer direction can be controlled by combining different noisy environments. The amplitude- damping environment determines whether there exists the entanglement transfer among bi-partitions of the system. When one qubit is coupled to an amplitude-damping environment and the other one to a bit-flip one, we find a very interesting result that all the quantum and the classical correlations, and even the entanglement, originally existing between the qubits, can be completely transferred without any loss to the qubit coupled to the bit-flit environment and the amplitude-damping environment. We also notice that it is possible to distinguish the quantum correlation from the classical correlation and the entanglement by combining different noisy environments.