Abstract
We study a family of Fredholm determinants associated to deformations of the sine kernel, parametrized by a weight function w. For a specific choice of w, this kernel describes bulk statistics of finite temperature free fermions. We establish a connection between these determinants and a system of integro-differential equations generalizing the fifth Painlevé equation, and we show that they allow us to solve an integrable PDE explicitly for a large class of initial data.
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Acknowledgements
The authors were supported by Fonds de la Recherche Scientifique-FNRS under EOS project O013018F, and by CNRS International Research Network PIICQ. TC was also supported by FNRS Research Project T.0028.23. The authors are grateful to Thomas Bothner for drawing their attention to the PDE (2.22) in [20], and to Alexander Its, Peter Miller and Gregory Schehr for useful comments.
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Claeys, T., Tarricone, S. On the Integrable Structure of Deformed Sine Kernel Determinants. Math Phys Anal Geom 27, 3 (2024). https://doi.org/10.1007/s11040-024-09476-x
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DOI: https://doi.org/10.1007/s11040-024-09476-x