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## A new spectral theory for Schur polynomials and applications Moll, Alexander | CIRM H

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Research schools;Combinatorics;Dynamical Systems and Ordinary Differential Equations

After Fourier series, the quantum Hopf-Burgers equation $v_t +vv_x = 0$ with periodic boundary conditions is equivalent to a system of coupled quantum harmonic oscillators, which may be prepared in Glauber's coherent states as initial conditions. Sending the displacement of each oscillator to infinity at the same rate, we (1) confirm and (2) determine corrections to the quantum-classical correspondence principle. After diagonalizing the Hamiltonian with Schur polynomials, this is equivalent to proving (1) the concentration of profiles of Young diagrams around a limit shape and (2) their global Gaussian fluctuations for Schur measures with symbol $v : T \to R$ on the unit circle $T$. We identify the emergent objects with the push-forward along $v$ of (1) the uniform measure on $T$ and (2) $H^{1/2}$ noise on $T$. Our proofs exploit the integrability of the model as described by Nazarov-Sklyanin (2013). As time permits, we discuss structural connections to the theory of the topological recursion. After Fourier series, the quantum Hopf-Burgers equation $v_t +vv_x = 0$ with periodic boundary conditions is equivalent to a system of coupled quantum harmonic oscillators, which may be prepared in Glauber's coherent states as initial conditions. Sending the displacement of each oscillator to infinity at the same rate, we (1) confirm and (2) determine corrections to the quantum-classical correspondence principle. After diagonalizing the ...

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