量子点中的非普适传输相：多体输运问题的精确对角化
Nonuniversal transmission phase lapses through a quantum dot: An exact-diagonalization of the many-body transport problem
摘要：
通过对量子点的哈密顿量进行精确对角化的多体输运计算，预测了电子在N=1 -> N=2跃迁时无相位延迟，N=2 -> N=3跃迁时有π延迟的情况下，通过量子点传输相位的非普适行为的系统趋势，与实验结果一致.结果有利于形状各向异性的点和强烈的电子-电子排斥与随之而来的电子本地化，显示依赖于自旋配置和参与激发门口传输通道。
英文摘要：
Systematic trends of nonuniversal behavior of electron transmission phases through a quantum dot, with no phase lapse for the transition N=1 -> N=2 and a lapse of pi for the N=2 -> N=3 transition, are predicted, in agreement with experiments, from many-body transport calculations involving exact diagonalization of the dot Hamiltonian. The results favor shape anisotropy of the dot and strong e-e repulsion with consequent electron localization, showing dependence on spin configurations and the participation of excited doorway transmission channels.
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