用极化中子测量贝里相

Physica B+C Pub Date : 1988-07-01 DOI:10.1016/0378-4363(88)90150-7

D. Dubbers

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引用次数: 5

摘要

当一个量子力学系统在参数空间中沿闭合回路绝热传输时，除了通常的动力学相位外，系统还会选择一个仅取决于系统几何历史的“拓扑”相位。这个阶段以Berry的名字命名，Berry在1984年预测了这个阶段，它有许多令人兴奋的特性。我们在螺旋磁场中测量了中子自旋的这些相。

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Measurement of the Berry phase with polarized neutrons

When a quantum mechanical system is transported adiabatically around a closed circuit in parameter space, the system will, in addition to the usual dynamical phase, pick up a “topological”phase which depends only on the geometric history of the system. This phase, which is named after Berry who predicted it in 1984, has a number of exciting properties. We have measured these phases in neutron spin-rotation in helical magnetic fields.

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Physica B+C

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