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首页> 外文期刊>Communications in Theoretical Physics >Entanglement Evolution of Three-Qubit States under Local Decoherence
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Entanglement Evolution of Three-Qubit States under Local Decoherence

机译:局部退相干下三量子位态的纠缠演化

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摘要

By using negativity as entanglement measure, we have investigated the effect of local decoherence from a non-Markovian environment on the time evolution of entanglement of three-qubit states including the GHZ state, the W state, and the Werner state. From the results, we find that the entanglement dynamics depends not only on the coupling strengths but also on the specific states of concern. Specifically, the entanglement takes different behaviors under weak or strong coupling and it varies with the quantum states under study. The entanglement of the GHZ state and the Werner state can be destroyed completely by the local decoherence, while the entanglement of the W state can survive through the local decoherence partially.
机译:通过使用负性作为纠缠度,我们研究了非马尔可夫环境中的局部退相干对包括GHZ状态,W状态和Werner状态在内的三个量子位纠缠态的时间演化的影响。从结果中,我们发现纠缠动力学不仅取决于耦合强度,还取决于所关注的特定状态。具体而言,纠缠在弱耦合或强耦合下具有不同的行为,并且随所研究的量子态而变化。 GHZ态和Werner态的纠缠可以被局部退相干完全破坏,而W态的纠缠可以通过局部退相干部分幸存。

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