Comments on \(\eta\)-deformed principal chiral model from 4D Chern-Simons theory

DOI10.1016/J.NUCLPHYSB.2020.115080zbMATH Open1479.58021arXiv2003.07309OpenAlexW3011070061MaRDI QIDQ821347

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Publication date: 20 September 2021

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Abstract: We study $eta$-deformations of principal chiral model (PCM) from the viewpoint of a 4D Chern-Simons (CS) theory. The $eta$-deformed PCM has originally been derived from the 4D CS theory by Delduc, Lacroix, Magro and Vicedo [arXiv:1909.13824]. The derivation is based on a twist function in the rational description. On the other hand, we start with a twist function in the trigonometric description and discuss possible boundary conditions. We show that a certain boundary condition reproduces the usual $eta$-deformed PCM and another one leads to a new kind of Yang-Baxter deformation.

Full work available at URL: https://arxiv.org/abs/2003.07309

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