Temperature effects on mixed-state geometric phase
Temperature effects on mixed-state geometric phase
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DOI：
10.1103/physreva.73.052117
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发表时间：
2005-12
影响因子：
2.9
通讯作者：
A. Rezakhani;P. Zanardi
中科院分区：
文献类型：
--
作者：
A. Rezakhani;P. Zanardi
Geometric phase of an open quantum system that is interacting with a thermal environment (bath) is studied through some simple examples. The system is considered to be a simple spin-half particle which is weakly coupled to the bath. It is seen that even in this regime the geometric phase can vary with temperature. In addition, we also consider the system under an adiabatically time-varying magnetic field which is weakly coupled to the bath. An important feature of this model is that it reveals existence of a temperature scale in which adiabaticity condition is preserved and beyond which the geometric phase is varying quite rapidly with temperature. This temperature is exactly the one in which the geometric phase vanishes. This analysis has some implications in realistic implementations of geometric quantum computation.
