| Entanglement control in one-dimensional s= 1/2 random XY spin chain |
| |
| 作者姓名： | 单传家 程维文 刘堂昆 黄燕霞 李宏 夏云杰 |
| |
| 作者单位： | Department of Physics, Hubei Normal University, Huangshi 435002, China;Department of Physics, Hubei Normal University, Huangshi 435002, China;Department of Physics, Hubei Normal University, Huangshi 435002, China;Department of Physics, Hubei Normal University, Huangshi 435002, China;Department of Physics, Hubei Normal University, Huangshi 435002, China;epartment of Physics, Qufu Normal University, Qufu 273165,China |
| |
| 基金项目： | Project supported by the Key
Higher Education Program of Hubei Province, China (Grant No
Z20052201), Natural Science Foundation of Hubei Province, China
(Grant No 2006ABA055) and Postgraduate Program of Hubei Normal
University of China (Grant No 2007D20). |
| |
| 摘 要： | The entanglement in one-dimensional random XY spin systems where the impurities of exchange couplings and the external magnetic fields are considered as random variables is investigated by solving the different spin-spin correlation functions and the average magnetization per spin. The entanglement dynamics near particular locations of the system is also studied when the exchange couplings （or the external magnetic fields） satisfy three different distributions （the Gaussian distribution, double-Gaussian distribution, and bimodal distribution）. We find that the entanglement can be controlled by varying the strength of external magnetic field and the distributions of impurities. Moreover, the entanglement of some nearest-neighbouring qubits can be increased for certain parameter values of the three different distributions.
|
| 关 键 词： | 自旋链 双自旋关联功能 缠结控制 高斯分布 |
| 收稿时间： | 6/9/2007 12:00:00 AM |
| 修稿时间： | 2007-09-24 |
Entanglement control in one-dimensional s=1/2 random XY spin chain |
| |
| Shan Chuan-Ji,Cheng Wei-Wen,Liu Tang-Kun,Huang Yan-Xi,Li Hong and Xia Yun-Jie.Entanglement control in one-dimensional s= 1/2 random XY spin chain[J].Chinese Physics B,2008,17(3):794-800. |
| |
| Authors: | Shan Chuan-Ji Cheng Wei-Wen Liu Tang-Kun Huang Yan-Xi Li Hong and Xia Yun-Jie |
| |
| Affiliation: | Department of Physics, Hubei Normal University, Huangshi 435002, China; epartment of Physics, Qufu Normal University, Qufu 273165,China |
| |
| Abstract: | The entanglement in one-dimensional random XY spin systems where
the impurities of exchange couplings and the external magnetic
fields are considered as random variables is investigated by solving
the different spin--spin correlation functions and the average
magnetization per spin. The entanglement dynamics near particular
locations of the system is also studied when the exchange couplings
(or the external magnetic fields) satisfy three different
distributions (the Gaussian distribution, double-Gaussian
distribution, and bimodal distribution). We find that the
entanglement can be controlled by varying the strength of external
magnetic field and the distributions of impurities. Moreover, the
entanglement of some nearest-neighbouring qubits can be increased
for certain parameter values of the three different distributions. |
| |
| Keywords: | the entanglement spin chain spin--spin correlation function Gaussian distribution |
| 本文献已被 维普 等数据库收录！ |
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
