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The master T-operator for the Gaudin model and the KP hierarchy

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arxiv 1306.1111 v3 pith:PJL25WJP submitted 2013-06-05 math-ph hep-thmath.MPnlin.SI

The master T-operator for the Gaudin model and the KP hierarchy

classification math-ph hep-thmath.MPnlin.SI
keywords gaudinhierarchymastermodelclassicalquantumt-operatorapproach
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Following the approach of [arXiv:1112.3310], we construct the master T -operator for the quantum Gaudin model with twisted boundary conditions and show that it satisfies the bilinear identity and Hirota equations for the classical KP hierarchy. We also characterize the class of solutions to the KP hierarchy that correspond to eigenvalues of the master T-operator and study dynamics of their zeros as functions of the spectral parameter. This implies a remarkable connection between the quantum Gaudin model and the classical Calogero-Moser system of particles.

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  1. Baxter Q-operators from a Schwinger-Boson construction of the master T-operator and the mKP hierarchy

    math-ph 2026-07 accept novelty 6.0

    A Schwinger-boson Fock-space trace defines the gl(M) master T-operator, and the same L-operator degenerates to the Q-operator L-operator of Bazhanov–Frassek–Lukowski–Meneghelli–Staudacher.