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arXiv 0903.4940cond-mat.mes-hallcond-mat.str-el
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相互作用开放系统中的非平衡电荷输运:两粒子共振和电流不对称

Nonequilibrium charge transport in an interacting open system: two-particle resonance and current asymmetry

Dibyendu Roy, Abhiram Soori, Diptiman Sen, Abhishek Dhar

摘要:

利用Lippman-Schwinger散射理论研究了开放量子点中的非平衡电子输运。当引线是费米液体时,在不同的化学势下,用微扰理论计算电流时,精确地计算了两粒子电流。我们发现了一个有趣的两粒子共振引起的相互作用,并获得观察它的标准时,施加一个小的偏置点。最后,对于一个没有空间反演对称性的系统,我们发现两粒子电流是完全不同的,这取决于电子是从左引线或右引线入射。

英文摘要:

We use Lippman-Schwinger scattering theory to study nonequilibrium electron transport through an interacting open quantum dot. The two-particle current is evaluated exactly while we use perturbation theory to calculate the current when the leads are Fermi liquids at different chemical potentials. We find an interesting two-particle resonance induced by the interaction and obtain criteria to observe it when a small bias is applied across the dot. Finally, for a system without spatial inversion symmetry we find that the two-particle current is quite different depending on whether the electrons are incident from the left lead or the right lead.

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