各向异性耦合量子位的几何相位  

Geometric Phase for the Qubits with Anisotropic Coupling

作　　者：袁兵[1] 梁麦林[1] 张福林[1] 

机构地区：[1]天津大学理学院,天津300072

出　　处：《河南师范大学学报（自然科学版）》2007年第1期75-77,182,共4页Journal of Henan Normal University(Natural Science Edition)

基　　金：国家自然科学基金(20376054)

摘　　要：对于各项异性耦合的两个量子位,当外加磁场缓慢变化时,计算了该体系的几何相位.结果表明,各向异性对于几何相位有显著的影响,这使得几何相位与磁场各分量形成的立体角之间的关系不再成立.并且各向异性耦合还可以使在各向同性耦合情况下几何相位为0状态的几何相位不为0.For two qubits with anisotropic coupling, the geometric is calculated when the external magnetic is slowly changing. The results show that anisotropy has great effect on the geometric phase, which destroys the relation between the geometric phase and the solid angle formed by the components of the magnetic field. And the anisotropic coupling makes the geometric phase nonzero for the state that the geometric phase is zero under the isotropic coupling.

关 键 词：量子位 几何相位 纠缠 

分 类 号：O413.1[理学—理论物理] O431.1[理学—物理]