Entanglement Dynamics of Two Qubits Coupled Independently to Cavities in the Ultrastrong Coupling Regime: Analytical Results

被引：15

作者：

Zhu, Wei-Ting ^{[1
]}

Ren, Qing-Bao ^{[1
]}

Duan, Li-Wei ^{[2
]}

Chen, Qing-Hu ^{[2
,3
]}

机构：

[1] Lishui Univ, Coll Engn & Design, Lishui 323000, Peoples R China

[2] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

[3] Collaborat Innovat Ctr Adv Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2016年 / 33卷 / 05期

基金：

中国国家自然科学基金;

关键词：

CUMMINGS MODEL; SUDDEN-DEATH; QUANTUM;

D O I：

10.1088/0256-307X/33/5/050302

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Dynamics of quantum entanglement of two qubits in two identical quantum Rabi models is studied analytically in the framework of corrections to the rotating-wave approximations. A closed-form expression for the entanglement dynamics initiated from the well-known Bell states is derived, which is very close to the numerical exact results up to the ultrastrong coupling regime. It is found that the vanishing entanglement can be purely induced by the counter-rotating terms, and can be enhanced with the atom-cavity coupling.

引用

页数：4

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