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Acta Optica Sinica

Entanglement of an Atom Interacting with Glauber-Lachs State in Multiphoton Jaynes-Cummings Model

冯川 Feng Chuan, 萨楚尔夫 Sachuerfu, 李红星 Li Hongxing

Published Jan 1, 2013• 0 citations
Publisher

Abstract

利用全量子理论,研究了多光子Jaynes—Cummings模型中混合态原子与Glauber-Lachs态相互作用系统的量子纠缠特性,讨论了相干平均光子数、热平均光子数、原子初态和跃迁光子数对系统纠缠特性的影响。结果表明,系统的纠缠度是相干平均光子数、热平均光子数的非单调函数;随着跃迁光子数的增加,系统的纠缠度的振荡频率明显增加,系统的平均纠缠度有减小趋势;原子初态对系统的纠缠度有明显影响,原子初态虽然趋于基态和趋于激发态的程度相同,但对系统的平均纠缠度的影响是不同的;原子初态的混合程度越大,跃迁光子数对系统的平均纠缠度的破坏作用越明显。

DOI
10.3788/aos201333.0527001

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利用全量子理论,研究了多光子Jaynes—Cummings模型中混合态原子与Glauber-Lachs态相互作用系统的量子纠缠特性,讨论了相干平均光子数、热平均光子数、原子初态和跃迁光子数对系统纠缠特性的影响。结果表明,系统的纠缠度是相干平均光子数、热平均光子数的非单调函数;随着跃迁光子数的增加,系统的纠缠度的振荡频率明显增加,系统的平均纠缠度有减小趋势;原子初态对系统的纠缠度有明显影响,原子初态虽然趋于基态和趋于激发态的程度相同,但对系统的平均纠缠度的影响是不同的;原子初态的混合程度越大,跃迁光子数对系统的平均纠缠度的破坏作用越明显。
纠纷被用来测量在分开的分系统之间的关联, von Neumann 熵被用来在和处于协调状态准备的领域的在原子之间的相互作用的过程学习原子的纠纷的进化。纠纷上的地紧张和 detuning 的效果被调查。纠纷与增加领域紧张在它的进化,他们的振幅和吝啬的价值减少展出了摆动,这被显示出。有 detuning 的摆动频率增加,而是最大的价值几乎独立于 detuning。关键词纠纷 - 纠缠的状态 - Jaynes-Cummings 模型 PACS2001 42.50 .-P
The dynamics of the Jaynes-Cummings interaction of a two-level atom interacting with a single mode of a radiation field prepared in a Glauber-Lachs state is investigated to study the development of seemingly chaotic oscillations of the atomic inversion from a regular collapse-and-revival phenomenon, as the field statistics is changed from the coherent state to the thermal state. The effect of thermal photons on the coherent light is shown to be striking: Both the photon distribution as well as the atomic inversion are highly sensitive to even a very small addition of thermal photons to an initially coherent radiation field. We also compare the collapse and revival occurring in the micromaser case with the Glauber-Lachs version of the Jaynes-Cummings model.
我们为二纠缠的原子 A 和 B 局部地与独立的洞交往的一个双 Jaynes-Cummings 模型学习纠纷动力学 and b,分别地但是在地点 Aa 和 Bb 之间没有相互作用。我们指出那在那里存在在的一个参数范围同时的 pairwise 纠纷为遥远的聚会的突然的死亡(ESD ) ,即 AB, ab, Ab 和 Ba,可以发生。我们证明在这个同时的 ESD 时期期间,各种各样的多国参加的纠纷能被创造。我们的结果暗示在二个独立地点之间的 pairwise 纠纷可以被变成说明在二个独立地点之间的关联的另外的多国参加的形式。