磁场引起的近藤单态退相干机制

摘要

磁场作为一个环境能够诱导近藤单态的退相干。我们采用格林函数方法，计算磁场下量子点耦合Aharonov－Bohm环系统的退相干特性，数值结果显示磁场引起的近藤单态的退相干是一个突然的过程。%The magnetic field can induce the decoherence of Kondo singlet as an environment.By employing the cluster expansion method, we calculate the differential conductance of a quantum dot coupling to Aharonov-Bo-hm ring under magnetic field.Our numerical results reveal that the decoherence of Kondo singlet, caused by magnetic field, is an abrupt process.