Quantum entanglement dynamics based on composite quantum collision model

Quantum entanglement dynamics based on composite quantum collision model
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基于复合量子碰撞模型的量子纠缠动力学

DOI:
10.1088/1674-1056/ab84d0
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发表时间:
2020-06
期刊:
影响因子:
1.7
通讯作者:
Man Zhong-Xiao
Man Zhong-Xiao
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Li Xiao-Ming;Chen Yong-Xu;Xia Yun-Jie;Zhang Qi;Man Zhong-Xiao

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利用复合量子碰撞模型,研究了一个双部系统的纠缠动力学,即两个量子比特s1和s2直接与一个中间辅助量子比特s1相互作用,而s1又与一个热储耦合。我们关注的是储量子位的碰撞如何影响纠缠动力学。我们表明,即使系统最初处于分离状态,由于量子比特之间的相互作用,它们的纠缠也可以产生。在长时间极限下,s1和s2的初始状态以及环境温度都可以产生稳态纠缠。我们还研究了s1、s2和sa三个量子位元分别在GHZ态和分离态初始制备时的三方纠缠动力学。对于GHZ初始态,当环境量子比特之间的碰撞强度足够大时,可以长时间保持三方纠缠。(纸)
By means of composite quantum collision models, we study the entanglement dynamics of a bipartite system, ie, two qubits S 1 and S 2 interacting directly with an intermediate auxiliary qubit S A, while S A is in turn coupled to a thermal reservoir. We are concerned with how the intracollisions of the reservoir qubits influence the entanglement dynamics. We show that even if the system is initially in the separated state, their entanglement can be generated due to the interaction between the qubits. In the long-time limit, the steady-state entanglement can be generated depending on the initial state of S 1 and S 2 and the environment temperature. We also study the dynamics of tripartite entanglement of the three qubits S 1, S 2, and S A when they are initially prepared in the GHZ state and separated state, respectively. For the GHZ initial state, the tripartite entanglement can be maintained for a long time when the collision strength between the environment qubits is sufficiently large.(paper)
四量子位模型的纠缠动力学研究
DOI: 10.1088/1674-1056/17/9/008
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影响因子: 1.7
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