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中国科学通报:英文版

Stationary entanglement of two atoms in a common reservoir

Man, Zhong-xiao, Su, Fang, Xia, YunJie

Published Jan 1, 2013• 6 citations
OpenAlex

Abstract

我们学习与一座普通结构化的水库交往的二个纠缠的原子的动力学。借助于原子动力学的准确溶液,我们显示出原子的起始的纠缠的状态的相对阶段控制的新奇的量干扰。量干扰在套住的激动状态的人口和原子的静止纠纷上有大影响。特别地,我们构造原子静止纠纷能在他们的起始的价值上在下面成长的一个明确的条件。

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我们学习与一座普通结构化的水库交往的二个纠缠的原子的动力学。借助于原子动力学的准确溶液,我们显示出原子的起始的纠缠的状态的相对阶段控制的新奇的量干扰。量干扰在套住的激动状态的人口和原子的静止纠纷上有大影响。特别地,我们构造原子静止纠纷能在他们的起始的价值上在下面成长的一个明确的条件。
我们学习由联合到普通真空环境的二个相同的非交往的单个模式的洞领域组成的一个系统并且借助于典型函数方法提供一般、明确、准确的解决方案给它的主人方程。我们在它的纠纷动力学被二模式的压榨参数和纯净强烈决定的这个模型和表演分析二模式的挤压的热状态的纠纷动力学。特别地,我们发现有压榨的参数的二模式的挤压的热状态是极其易碎的并且几乎不在普通真空环境幸存。我们在如此的环境为二模式的挤压的热状态调查 nonlocality 的时间进化。发展状态在进化的开始失去它的 nonlocality,这被发现,但是在一时间以后, nonlocality 的苏醒能发生。
The stationary entanglement and Bell violation of two qubits collectively interacting with a common thermal reservoir is investigated, and the analytical relations among average thermal photon number of the reservoir, entanglement and Bell violation of two qubits are given in detail. The initial fraction of Bell singlet state determines whether the common thermal reservoir can enhance the entanglement of two qubits or not in this case. Moreover, the stationary maximally entangled mixed state can emerge in the collective decay of two qubits in a thermal reservoir at zero-temperature only if the fraction of Bell singlet state in the initial state is not smaller than 2/3. Furthermore, it is shown that the collective decay can induce the entanglement of two qutrits initially in the maximally mixed state, and induce distillable entanglement from bound entangled states.