【摘要】 由于电子的多体关联和量子相干性的联合作用,双量子点Aharonov-Bohm干涉系统中的电子输运过程隐含内在的快、慢两条通道,且通道之间的有效耦合强度可以通过磁通调控.但是,这一非平庸的内在性质,在通常的稳态输运电流中不能得以反映.本文利用在研究非平衡动力学相变中所发展的大偏离方法,对该输运系统中的电子动力学路径做大偏离统计分析.结果显示,以上内在性质将诱导出路径空间中清晰的动力学相变行为.更多还原

【Abstract】 The Coulomb correlation and quantum coherence in a double-dot Aharonov-Bohm interferometer can result in two distinct transport channels:a fast channel and a slow one,while their coupling is tunable by changing the magnetic flux passing through an interference loop.However,these effects cannot be manifested by the conventional transport current.In this work,employing the large-deviation method which was originally developed in the nonequilibrium statistical mechanics,we perform a large-deviation analysis for the transport through this double-dot interferometer system and reveal a clear dynamical phase transition behavior.更多还原