A. V. Litvinov — Neckpinchhttps://neckpinch.com/authors/a-v-litvinov/New arXiv papers by A. V. Litvinov, from Neckpinch Tue, 10 Nov 2026 04:10:28 GMT On dual description of the deformed O(N) sigma modelhttps://neckpinch.com/papers/1804.07084/arxiv:1804.07084Thu, 19 Apr 2018 00:00:00 GMTA. V. Litvinov, L. A. Spodyneiko — We study dual strong coupling description of integrability-preserving deformation of the O(N) sigma model. Dual theory is described by a coupled theory of Dirac fermions with four-fermion interaction and bosonic fields with exponential interactions. We claim that both theories share the same integrable structure and coincide as quantum field theories. We construct a solution of Ricci flow equation which behaves in the UV as a free theory perturbed by graviton operators and show that it coincides with the metric of the η-deformed O(N) sigma-model after T-duality transformation.Ricci flowPhysics