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arXiv 1809.04813math-phmath.MP
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一维随机势Schrodinger算子的Szegö型定理(光滑情形)

Szegö-type Theorems for One-Dimensional Schrodinger Operator with Random Potential (smooth case)

L. Pastur, M. Shcherbina

摘要:

本文是工作[15]的继续,其中给出了遍历算子Szegö定理类似物的一般设置,并考虑了几种有趣的情况。本文将文[15]的结果推广到更广泛的一类检验函数和符号,这些检验函数和符号决定了具有随机势的一维Schrodinger算子的Szegö型渐近公式。我们表明,在这种情况下,该公式的subleading项是由一个中心极限定理在频谱的上下文中,因此该术语是渐近成比例的$L^{1/2}$,其中$L$是薛定谔算子最初定义的区间的长度。这必须与经典的Szegö公式进行比较,其中子前导项在$L$,$L \to \infty$中有界。我们证明了一个模拟的标准中心极限定理(收敛的概率相应的事件的高斯定律),以及一个模拟的几乎肯定的中心极限定理(收敛的概率为1的对数平均值的指标相应的事件的高斯定律)。我们通过建立非零温度下自由无序费米子的纠缠熵的渐近公式来说明我们的一般结果。

英文摘要:

The paper is a continuation of work [15] in which the general setting for analogs of the Szegö theorem for ergodic operators was given and several interesting cases were considered. Here we extend the results of [15] to a wider class of test functions and symbols which determine the Szegö-type asymptotic formula for the one-dimensional Schrodinger operator with random potential. We show that in this case the subleading term of the formula is given by a Central Limit Theorem in the spectral context, hence the term is asymptotically proportional to $L^{1/2}$, where $L$ is the length of the interval on which the Schrodinger operator is initially defined. This has to be compared with the classical Szegö formula, where the subleading term is bounded in $L$, $L \to \infty$. We prove an analog of standard Central Limit Theorem (the convergence of the probability of the corresponding event to the Gaussian Law) as well as an analog of the almost sure Central Limit Theorem (the convergence with probability 1 of the logarithmic means of the indicator of the corresponding event to the Gaussian Law). We illustrate our general results by establishing the asymptotic formula for the entanglement entropy of free disordered Fermions for non-zero temperature.

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