| 四量子比特Heisenberg XX开链中的成对纠缠 |
| |
| 引用本文： | 吴克栋,曹万强. 四量子比特Heisenberg XX开链中的成对纠缠[J]. 延边大学学报(自然科学版), 2009, 35(2): 132-136 |
| |
| 作者姓名： | 吴克栋 曹万强 |
| |
| 作者单位： | 吴克栋,WU Ke-dong(仰恩大学,计算机与信息学院,福建,泉州,362014);曹万强,CAO Wan-qiang(湖北大学,物理学与电子技术学院,湖北,武汉,430062) |
| |
| 基金项目： | 湖北省教育厅重点项目 |
| |
| 摘 要： | 研究外加磁场作用下的四量子比特Heisenberg XX开链中的成对纠缠，得到了纠缠度量Concurrence的解析表达．研究发现在外加均匀磁场系统中边界比特间的纠缠值可达到0．28．此外，在外加磁场作用在边界比特上的Heisenberg XX模型中，低温时通过增大磁场强度可以使两个非边界比特处于最大纠缠．
|
| 关 键 词： | 纠缠 Heisenberg XX开链 量子比特 |
Pairwise Entanglement in the Four-qubit Heisenberg XX Open Chain |
| |
| WU Ke-dong,CAO Wan-qiang. Pairwise Entanglement in the Four-qubit Heisenberg XX Open Chain[J]. Journal of Yanbian University (Natural Science), 2009, 35(2): 132-136 |
| |
| Authors: | WU Ke-dong CAO Wan-qiang |
| |
| Affiliation: | WU Ke-dong , CAO Wan-qiang ( 1. Computer and Information College, Yang ＇ en University, Quanzhou 362014, China ; 2. School of Physics and Electronic Technology, Hubei University, Wuhan 430062, China ) |
| |
| Abstract: | The pairwise entanglement in the four-qubit Heisenberg XX open chain with external magnetic fields is calculated, and the analytical expressions for the measures of entanglement Concurrence are obtained. It is found that the entanglement between the boundary qubits can reach the value of 0.28 in the system with uniform external magnetic fields. In addition, in the Heisenberg XX model with external magnetic fields on the two boundary qubits, the two non-boundary qubits will be in the maximal entanglement by increasing the magnetic field at low temperature. |
| |
| Keywords: | entanglement Heisenberg XX open chain qubit |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
