量子光学学报, 2019, 25 (3): 282, 网络出版: 2019-09-27  

两个三能级原子间的纠缠演化特性

Entanglement Evolution between Two Three-level Atoms
闫丽 *
作者单位
菏泽学院 物理与电子工程学院,菏泽 274015
摘要
本文研究了由一个∧型三能级原子、一个∨型三能级原子和一个单模光场相互作用的系统,在一个原子处于激发态而另一个原子处于基态的初始状态下,给出了系统态矢的演化。采用部分转置密度矩阵的负本征值来描述两原子间的纠缠,利用数值计算的方法讨论了原子间偶极-偶极相互作用和光子数对原子间纠缠特性的影响。研究结果表明: 原子间的偶极-偶极相互作用增强原子间的纠缠,而光子数减小原子间的纠缠。
Abstract
In this paper,we have investigated a system that is composed of a ∧-type three-level atom and a ∨-type three-level atom with a single-mode photon field.Under the initial state of one atom is exticed state and the other one is in the ground state,the evolution of the state vector of the system is delivered.The entanglement between atoms is described by using the negative eigenvalues of the partially transposed density matrix,the effects of the interatomic dipole-dipole interaction strength and photon number on the atoms entanglement evolution are analyzed by means of numerical calculation.The results show that: The interatomic dipole-dipole interaction enhances entanglement between atoms,while photon number decreases entanglement between atoms.
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闫丽. 两个三能级原子间的纠缠演化特性[J]. 量子光学学报, 2019, 25(3): 282. YAN Li. Entanglement Evolution between Two Three-level Atoms[J]. Acta Sinica Quantum Optica, 2019, 25(3): 282.

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