Statistics of Extremes in Eigenvalue-Counting Staircases

Yan V. Fyodorov; Pierre Le Doussal

doi:10.1103/PhysRevLett.124.210602

Statistics of Extremes in Eigenvalue-Counting Staircases

Yan V. Fyodorov, Pierre Le Doussal

Mathematics

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Abstract

We consider the number NθA(θ) of eigenvalues eiθj of a random unitary matrix, drawn from CUEβ(N), in the interval θj∈[θA,θ]. The deviations from its mean, NθA(θ)-E[NθA(θ)], form a random process as function of θ. We study the maximum of this process, by exploiting the mapping onto the statistical mechanics of log-correlated random landscapes. By using an extended Fisher-Hartwig conjecture supplemented with the freezing duality conjecture for log-correlated fields, we obtain the cumulants of the distribution of that maximum for any β>0. It exhibits combined features of standard counting statistics of fermions (free for β=2 and with Sutherland-type interaction for β≠2) in an interval and extremal statistics of the fractional Brownian motion with Hurst index H=0. The β=2 results are expected to apply to the statistics of zeroes of the Riemann Zeta function.

Original language	English
Article number	210602
Journal	Physical Review Letters
Volume	124
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.124.210602
Publication status	Published - 29 May 2020

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10.1103/PhysRevLett.124.210602

Statistics of extremes_FYODOROV_Accepted_5 May 2020_GREEN_AAMAccepted author manuscript, 2.02 MB

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title = "Statistics of Extremes in Eigenvalue-Counting Staircases",

abstract = "We consider the number NθA(θ) of eigenvalues eiθj of a random unitary matrix, drawn from CUEβ(N), in the interval θj∈[θA,θ]. The deviations from its mean, NθA(θ)-E[NθA(θ)], form a random process as function of θ. We study the maximum of this process, by exploiting the mapping onto the statistical mechanics of log-correlated random landscapes. By using an extended Fisher-Hartwig conjecture supplemented with the freezing duality conjecture for log-correlated fields, we obtain the cumulants of the distribution of that maximum for any β>0. It exhibits combined features of standard counting statistics of fermions (free for β=2 and with Sutherland-type interaction for β≠2) in an interval and extremal statistics of the fractional Brownian motion with Hurst index H=0. The β=2 results are expected to apply to the statistics of zeroes of the Riemann Zeta function.",

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AU - Fyodorov, Yan V.

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N2 - We consider the number NθA(θ) of eigenvalues eiθj of a random unitary matrix, drawn from CUEβ(N), in the interval θj∈[θA,θ]. The deviations from its mean, NθA(θ)-E[NθA(θ)], form a random process as function of θ. We study the maximum of this process, by exploiting the mapping onto the statistical mechanics of log-correlated random landscapes. By using an extended Fisher-Hartwig conjecture supplemented with the freezing duality conjecture for log-correlated fields, we obtain the cumulants of the distribution of that maximum for any β>0. It exhibits combined features of standard counting statistics of fermions (free for β=2 and with Sutherland-type interaction for β≠2) in an interval and extremal statistics of the fractional Brownian motion with Hurst index H=0. The β=2 results are expected to apply to the statistics of zeroes of the Riemann Zeta function.

AB - We consider the number NθA(θ) of eigenvalues eiθj of a random unitary matrix, drawn from CUEβ(N), in the interval θj∈[θA,θ]. The deviations from its mean, NθA(θ)-E[NθA(θ)], form a random process as function of θ. We study the maximum of this process, by exploiting the mapping onto the statistical mechanics of log-correlated random landscapes. By using an extended Fisher-Hartwig conjecture supplemented with the freezing duality conjecture for log-correlated fields, we obtain the cumulants of the distribution of that maximum for any β>0. It exhibits combined features of standard counting statistics of fermions (free for β=2 and with Sutherland-type interaction for β≠2) in an interval and extremal statistics of the fractional Brownian motion with Hurst index H=0. The β=2 results are expected to apply to the statistics of zeroes of the Riemann Zeta function.

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Statistics of Extremes in Eigenvalue-Counting Staircases

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