光学学报, 2011, 31 (4): 0427002, 网络出版: 2011-04-01
经典驱动Tavis-Cummings模型中原子纠缠特性的研究
Entanglement Characteristics of Two Entangled Atoms in Classical Driven Tavis-Cummings Model
量子光学 量子纠缠 部分转置矩阵负本征值 偶极子偶极子(偶偶)相互作用 经典场驱动 quantum optics quantum entanglement negative eigenvalues of the partial transposed mat dipole-dipole interaction the classical field driven
摘要
研究了受经典场驱动的两个二能级原子与单模腔场相互作用系统中两原子的纠缠动力学行为。该工作主要是对原子间的偶极子偶极子(偶偶)相互作用和经典场驱动同时存在的Tavis-Cummings模型进行了研究,采用数值计算的方法,详细分析了经典场的驱动强度、原子间的偶偶相互作用强度和原子与腔场之间的失谐量对原子纠缠特性的影响。同时讨论了原子与腔场共振和非共振两种情况下,原子间偶偶相互作用和经典场驱动强度的最优参数区域。结果表明,适当调节经典场的驱动强度,原子间的偶偶相互作用强度和原子与腔场之间的失谐量,可以使原子的纠缠突然死亡现象得到抑制。
Abstract
The dynamical behaviors of two entangled two-level atoms, which interact with a single-mode cavity field and driven by the classical field are investigated. The Tavis-Cummings model in which the dipole-dipole interaction between two atoms and the classical driven strength exists simultaneously is studied. By means of numerical calculations, we analyze the effect of the classical field driven strength, dipole-dipole interaction between two atoms and the detuning between atoms and cavity field on the entanglement dynamical properties of two atoms. Meanwhile, we discuss the optimal region of dipole-dipole interaction between two atoms and the classical field driven strength in the case of resonance and offresonance between atoms and cavity field. The result shows that when we choose the appropriate conditions, the phenomenon of entanglement sudden death can be inhibited.
韩美, 张英杰, 夏云杰. 经典驱动Tavis-Cummings模型中原子纠缠特性的研究[J]. 光学学报, 2011, 31(4): 0427002. Han Mei, Zhang Yingjie, Xia Yunjie. Entanglement Characteristics of Two Entangled Atoms in Classical Driven Tavis-Cummings Model[J]. Acta Optica Sinica, 2011, 31(4): 0427002.