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arXiv 1504.07285math-phcond-mat.stat-mechmath.MPquant-ph
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一维样品的电导和绝对连续谱

Conductance and absolutely continuous spectrum of 1D samples

Laurent Bruneau, Vojkan Jakšić, Yoram Last, Claude-Alain Pillet

摘要:

利用Landauer-Büttiker的极限行为和有限样本的无边界电导,刻画了一维薛定谔算子$h=-Δ+v$作用于$\ell^2(\mathbb{Z}_+)$的绝对连续谱.通过将$h$限制为有限区间$[1,L]\cap\mathbb{Z}_+$来定义有限样品,并且电导是指通过将独立的电子库附接到样品末端而获得的开放量子系统中的样品上的电荷电流。我们的主要结果是,与能量间隔$I$相关联的电导在极限$L\to\infty$中是非零的当且仅当${\rm sp}_{\rm ac}(h)\cap I=\emptyset$。我们还讨论了这个结果与薛定谔猜想之间的关系。

英文摘要:

We characterize the absolutely continuous spectrum of the one-dimensional Schrödinger operators $h=-Δ+v$ acting on $\ell^2(\mathbb{Z}_+)$ in terms of the limiting behavior of the Landauer-Büttiker and Thouless conductances of the associated finite samples. The finite sample is defined by restricting $h$ to a finite interval $[1,L]\cap\mathbb{Z}_+$ and the conductance refers to the charge current across the sample in the open quantum system obtained by attaching independent electronic reservoirs to the sample ends. Our main result is that the conductances associated to an energy interval $I$ are non-vanishing in the limit $L\to\infty$ iff ${\rm sp}_{\rm ac}(h)\cap I=\emptyset$. We also discuss the relationship between this result and the Schrödinger Conjecture.

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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