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arXiv · 2601.12843

Fermionic Basis in Conformal Field Theory: The Free Fermion Point

Sergei Adler·Hermann Boos
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Abstract

In this work, we use the master function approach to describe the CFT limit of the six-vertex model at the free fermion point. Using the ODE/IM correspondence, we obtain an explicit form of the master function. This allows us to compute the asymptotic expansion of the function $\omega(\lambda, \mu)$ describing the expectation values of the fermionic basis operators. As a result, we describe the entire Virasoro module of the corresponding CFT, including the integrals of motion as well.

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Sergei Adler, Hermann Boos. 2026-01-19. Fermionic Basis in Conformal Field Theory: The Free Fermion Point. https://arxiv.org/abs/2601.12843

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