Microscopic zeta-function process convergence to the limiting characteristic function

Let ω\omega be uniform on [0,1][0,1], let T>0T>0 tend to infinity, and let ξ\xi_{\infty} be the limiting random analytic function arising from the microscopic scaling of characteristic polynomials of Haar-distributed unitary matrices. For zCz\in\mathbb C, consider the randomized, renormalized zeta function

FT(z):=ζ(12+iTω2πizlogT)ζ(12+iTω).F_T(z):=\frac{\zeta\left(\frac12+iT\omega-\frac{2\pi i z}{\log T}\right)}{\zeta\left(\frac12+iT\omega\right)}.

Microscopic zeta-function convergence conjecture. In law, uniformly for zz on every compact subset of C\mathbb C,

(FT(z);zC)T(ξ(z);zC).\bigl(F_T(z);z\in\mathbb C\bigr)\underset{T\to\infty}{\longrightarrow}\bigl(\xi_{\infty}(z);z\in\mathbb C\bigr).

Moreover, on compact sets bounded away from the real line, the logarithmic derivatives should satisfy

(2πilogTζζ(12+iTω2πizlogT);zC)T(ξξ(z);zC).\left(\frac{-2\pi i}{\log T}\frac{\zeta'}{\zeta}\left(\frac12+iT\omega-\frac{2\pi i z}{\log T}\right);z\in\mathbb C\right)\underset{T\to\infty}{\longrightarrow}\left(\frac{\xi_{\infty}'}{\xi_{\infty}}(z);z\in\mathbb C\right).

This is the source's central process-level conjecture linking the microscopic zeta function to the limiting random analytic function. It would imply corresponding predictions for microscopic zeros and logarithmic derivatives, but no resolution is stated.

Sources & referencesView supporting material

Primary source

Reda Chhaibi, Joseph Najnudel and Ashkan Nikeghbali, “The Circular Unitary Ensemble and the Riemann zeta function: the microscopic landscape and a new approach to ratios”, arXiv:1410.1440 (2015).

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