| 各向异性光子晶体中二能级原子和自发辐射场间的纠缠 |
| |
| 引用本文： | 谢双媛,胡翔. 各向异性光子晶体中二能级原子和自发辐射场间的纠缠[J]. 海洋学报, 2010, 32(9): 6172-6177 |
| |
| 作者姓名： | 谢双媛 胡翔 |
| |
| 作者单位： | 同济大学物理系,上海 200092;同济大学物理系,上海 200092 |
| |
| 摘 要： | 应用 Von Neumann熵 和 Schmidt number K两种纠缠度量讨论了各向异性光子晶体中二能级原子和自发辐射场间纠缠度的演化性质. 研究发现,原子-光场纠缠度的演化与原子上能级和光子晶体能带带边的相对位置有关,当原子上能级处于光子晶体禁带内,原子-光场纠缠度将保持稳定,当原子上能级处于光子晶体能带中,原子-光场纠缠度先增大后衰减到零. 纠缠度的大小还与原子的初态有关. 可以通过控制原子的初态和原子上能级与带边的相对位置来控制原子-光场纠缠度的演化特性.
|
| 关 键 词： | 纠缠 光子晶体 原子熵 Schmidt number K |
Entanglement between a two-level atom and spontaneous emission field in anisotropic photonic crystal |
| |
| Xie Shuang-Yuan and Hu Xiang. Entanglement between a two-level atom and spontaneous emission field in anisotropic photonic crystal[J]. Acta Oceanologica Sinica (in Chinese), 2010, 32(9): 6172-6177 |
| |
| Authors: | Xie Shuang-Yuan and Hu Xiang |
| |
| Affiliation: | Department of Physics, Tongji University, Shanghai 200092, China;Department of Physics, Tongji University, Shanghai 200092, China |
| |
| Abstract: | By means of Von Neumann entropy and Schmidt number K, we study the time evolution properties of the entanglement between a two-level atom and spontaneous emission field in anisotropic photonic crystal. The evolution properties of the atom-field entanglement are directly related to the relative position of the upper level from the band edge. The atom-field entanglement can keep steady when the atomic upper level is within the band gap. The atom-field entanglement increases to the maximum value firstly and then decay to zero when the atomic upper level is within the transmitting band. The atom-field entanglement also depends on the initial state of the atom. We can control the time evolution properties of the atom-field entanglement by choosing special atomic initial state and the relative position of the upper level from the band edge. |
| |
| Keywords: | entanglement photonic crystal atomic quantum entropy Schmidt number K |
|
| 点击此处可从《海洋学报》浏览原始摘要信息 |
|
点击此处可从《海洋学报》下载全文 |
