Entanglement evolution of two qubits under noisy environments

Entanglement evolution of two qubits under noisy environments
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噪声环境下两个量子比特的纠缠演化

DOI:
10.1103/physreva.82.042318
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发表时间:
2010-10
期刊:
影响因子:
2.9
通讯作者:
Shao, Bin
Shao, Bin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li, Jun-Gang;Zou, Jian;Shao, Bin

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研究了两量子比特在局域、单边和双边噪声信道下的纠缠演化。研究发现,对于所有的纯初态,单边噪声信道下的纠缠完全由最大迹距决定,而最大迹距是构造非马尔可夫性测度的主要因素.对于双边噪声信道的情况,当量子比特初始处于一般的纯态或混合态时,纠缠可以表示为初始纠缠和信道对最大纠缠态的作用的乘积。
The entanglement evolution of two qubits under local, single-, and two-sided noisy channels is investigated. It is found that for all pure initial states, the entanglement under a one-sided noisy channel is completely determined by the maximal trace distance which is the main element to construct the measure of non-Markovianity. For the two-sided noisy channel case, when the qubits are initially prepared in a general class of states, either pure or mixed, the entanglement can be expressed as the product of the initial entanglement and the channels' action on the maximally entangled state.
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