Skip to content

On the commuting charges and the Bethe ansatz for the quantised Kadomtsev-Petviashvili equation

Chiara Paletta, Alessandro Torrielli

hep-tharXiv:2609.15316

Abstract

We study the quantised version of the Kadomtsev-Petviashvili equation in the formulation proposed in [4]. We analyse two aspects. One is the conservation of the first higher charge H3 (besides the total mass H0, the momentum H1 and the Hamiltonian H2). We find the expression of H3 and prove commutativity, provided we regularise a specific ultraviolet divergence. The result then does not depend on the choice of a regulator, under fairly general assumptions. We then study the Bethe ansatz in finite volume and obtain a general solution to the two-body problem. We have used AI supervised by us to aid the proofs.

Create a lesson