Quantum phase transition and entanglement in Heisenberg XX spin chain with impurity |
| |
Authors: | Chen Shi-Rong Xia Yun-Jie Man Zhong-Xiao |
| |
Affiliation: | Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China |
| |
Abstract: | In this paper, we study the quantum phase transition andthe effect of impurity on the thermal entanglement between any twolattices in three-qubit Heisenberg XX chain in a uniform magneticfield. We show that the quantum phase transition always appears whenimpurity parameter is an arbitrary constant and unequal to zero, theexternal magnetic field and impurity parameters have a great effecton it. Also, there exists a relation between the quantum phasetransition and the entanglement. By modulating the temperature,magnetic field and the impurity parameters, the entanglement betweenany two lattices can exhibit platform-like behaviour, which can beused to realize entanglement switch. |
| |
Keywords: | Heisenberg XX chain thermal entanglement impuritylattice quantum phase transition |
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 |
|