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arXiv 0802.2380cond-mat.mes-hallcond-mat.str-el
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电子从相互作用区的散射

Scattering of electrons from an interacting region

Abhishek Dhar, Diptiman Sen, Dibyendu Roy

摘要:

我们解决的问题,通过一个区域,它们相互作用(量子点)的两个非相互作用的铅之间的电子传输。我们使用一个模型的无自旋电子跳跃的一维晶格和一个单键上的相互作用。我们表明,所有的两粒子散射态可以准确地找到。与数值结果的比较,一个两粒子的波包的时间演化和几个有趣的功能被发现的散射。对于N个粒子,用微扰理论得到了散射态。对于一个点连接到费米海在不同的化学势,我们找到了一个表达的变化,在朗道电流所造成的相互作用的点。最后,我们对自旋为1/2的电子的情况作了一些评论。

英文摘要:

We address the problem of transmission of electrons between two noninteracting leads through a region where they interact (quantum dot). We use a model of spinless electrons hopping on a one-dimensional lattice and with an interaction on a single bond. We show that all the two-particle scattering states can be found exactly. Comparisons are made with numerical results on the time evolution of a two-particle wave packet and several interesting features are found for scattering. For N particles the scattering state is obtained by perturbation theory. For a dot connected to Fermi seas at different chemical potentials, we find an expression for the change in the Landauer current resulting from the interactions on the dot. We end with some comments on the case of spin-1/2 electrons.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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