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Characteristic Polynomials for 1D Random Band Matrices from the Localization Side

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Abstract

We study the special case of \({n\times n}\) 1D Gaussian Hermitian random band matrices, when the covariance of the elements is determined by \({J=(-W^2\triangle+1)^{-1}}\). Assuming that the band width \({W\ll \sqrt{n}}\), we prove that the limit of the normalized second mixed moment of characteristic polynomials (as \({W, n\to \infty}\)) is equal to one, and so it does not coincide with that for GUE. This complements the result of Shcherbina (J Stat Phys 155(3):466–499, 2014) and proves the existence of the expected crossover for 1D Hermitian random band matrices at \({W\sim \sqrt{n}}\) on the level of characteristic polynomials.

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Correspondence to Tatyana Shcherbina.

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Communicated by L. Erdös

Tatyana Shcherbina was partially supported by NSF Grant DMS-1128155.

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Shcherbina, M., Shcherbina, T. Characteristic Polynomials for 1D Random Band Matrices from the Localization Side. Commun. Math. Phys. 351, 1009–1044 (2017). https://doi.org/10.1007/s00220-017-2849-2

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  • DOI: https://doi.org/10.1007/s00220-017-2849-2

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