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Chinese Physics Letters

Dynamics of Genuine Three-Qubit Entanglement in Ising Spin Systems

庞朝阳, 李玉良

Published Jan 1, 2006• 0 citations
OpenAlex

Abstract

我们在三旋转的 Isingmodel 调查真 three-qubit 纠纷的动力学。一个计划为由近邻居的政变石楠产生真 three-qubit 纠纷被介绍。genuinethree-qubit 纠纷的动力学上的磁场的效果也被讨论。

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我们认为纠纷是与独立结构化的 non-Markovian 水库交往的三个二水平的原子的动力学。原子开始在混合多国参加的 Greenberger 被准备 -- Horne -- Zeilinger (GHZ ) 类型状态。基于纯净和 non-Markovian 水库，我们证明水库的纠纷能展出多国参加的纠纷不仅突然的出生而且纠纷原子纠纷的突然的死亡，和苏醒没被水库的解开纠结总是伴随。同时，我们为多国参加的苏醒和死亡现象导出量的标准并且发现多国参加的纠纷突然的死亡和纠纷同时的鬼怪时间是的突然的出生独立于起始的 three-qubit 状态。[从作者抽象]
We study the dynamics of genuine multipartite entanglement for quantum systems upto four qubits interacting with general collective dephasing process. Using a computable entanglement monotone for multipartite systems, we observe the feature of freezing dynamics of genuine entanglement for three and four qubits entangled states. We compare the dynamics with that of random states and find that most states exibit this feature. We then study the effects of collective dephasing on genuine nonlocality and find out that although quantum states remain genuinely entangled yet their genuine nonlocality is lost in a finite time. We show the sensitivity of asymptotic states being genuinely entangled by mixing white noise.