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arXiv · 1310.6985

Quantum Gaudin model and classical KP hierarchy

A. Zabrodin
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Abstract

This short note is a review of the intriguing connection between the quantum Gaudin model and the classical KP hierarchy recently established in [1]. We construct the generating function of integrals of motion for the quantum Gaudin model with twisted boundary conditions (the master T-operator) and show that it satisfies the bilinear identity and Hirota equations for the classical KP hierarchy. This implies that zeros of eigenvalues of the master $T$-operator in the spectral parameter have the same dynamics as the Calogero-Moser system of particles.

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A. Zabrodin. 2013-10-25. Quantum Gaudin model and classical KP hierarchy. https://doi.org/10.1088/1742-6596/482/1/012047

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