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arXiv 2401.07262math-phmath.MP
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特征函数与量子输运及其在Γ-修剪薛定谔算子中的应用

Eigenfunctions and Quantum Transport with Applications to Trimmed Schrodinger Operators

Peter D> Hislop, Werner Kirsch, M. Krishna

AI总结:

本文利用预解恒等式和Combes-Thomas估计,在解满足增长条件时证明离散薛定谔算子的动力学离域,并将其应用于Γ-修剪薛定谔算子及Anderson模型,得到同时具有局域化与离域现象的随机遍历模型。

摘要:

我们给出了动力学离域的一个简单证明,即对于定义在 $\ell^2 (\mathbb{Z}^d)$ 上的离散单粒子薛定谔算子,只要薛定谔方程的解满足一定的增长条件,量子输运就具有随时间增长的下界。该证明基于基本的预解恒等式以及关于格林函数指数衰减的 Combes-Thomas 估计。作为推论,我们证明对于能量位于 $H$ 的谱之外的广义特征函数,其必须在某些方向上指数增长。我们还证明,如果 $H$ 具有任何绝对连续谱,则该薛定谔算子表现出动力学离域。我们将这一一般结果应用于具有周期 $Γ$ 的 $Γ$-修剪薛定谔算子,并证明这些算子具有动力学离域。这些结果也适用于 $Γ$-修剪 Anderson 模型,从而提供了一个既在某个能量区间内表现出动力学局域化、又表现出动力学离域的随机遍历模型。

英文摘要:

We provide a simple proof of dynamical delocalization, that is, time-increasing lower bounds on quantum transport for discrete, one-particle Schrodinger operators on $\ell^2 (\mathbb{Z}^d)$, provided solutions to the Schrodinger equation satisfy certain growth conditions. The proof is based on basic resolvent identities and the Combes-Thomas estimate on the exponential decay of the Green's function. As a consequence, we prove that generalized eigenfunctions for energies outside the spectrum of $H$ must grow exponentially in some directions. We also prove that if $H$ has any absolutely continuous spectrum, then the Schrodinger operator exhibits dynamical delocalization. We apply the general result to $Γ$-trimmed Schrodinger operators, with periodic $Γ$, and prove dynamical delocalization for these operators. These results also apply to the $Γ$-trimmed Anderson model, providing a random, ergodic model exhibiting both dynamical localization in an energy interval and dynamical delocalization.

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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