所属单位：

理学院

发表刊物：

中国物理快报

关键字：

中文关键字：几何相位;混合自旋链;热态，英文关键字：Geometric phase;Mixed-spin system;thermal state

摘要：

We study the geometric phase of a qutrit-qubit mixed-spin system in an external homogeneous magnetic field.Both the spin-spin interaction strength and the external magnetic field can affect the geometric phase of the system. In addition, we consider the negativity of the composite system. The relationship between the negativity and the geometric phase is obtained. Finally, we calculate the geometric phase for a thermal mixed state and show how the geometric phase depends on the rescaled coupling parameter and temperature. In the limit,we can recover the result of the ground state. This analysis has some implications in realistic implementations of geometric quantum computation.

备注：

张爱萍

第一作者：

杨永明,辛红,凌亚文,强稳朝,张爱萍

论文类型：

期刊论文

卷号：

卷：28

期号：

期：8

页面范围：

页：080301-1—080301-4

是否译文：

否

发表时间：

2011-08-01