Ricci-flow conjecture for the trigonometric deformation of the flag-variety sigma model

Let GG be a compact group with complexification GCG_{\mathbb C}, let BB be a Borel subgroup, and let ss be the trigonometric deformation parameter. The resulting family of metrics on the flag variety GC/BG_{\mathbb C}/B has the maximal torus TT as an isometry group. After an ss-dependent change of coordinates and setting t=logst=\log s, Ricci-flow conjecture. the trigonometric integrable deformation of the sigma model should agree with the renormalization-group flow, and the family of metrics on GC/BG_{\mathbb C}/B should satisfy the Ricci-flow equation. This identifies the integrable deformation with the renormalization-group evolution, but the source leaves proving or disproving the claim as an open question.

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Primary source

Kevin Costello and Masahito Yamazaki, “Gauge Theory And Integrability, III”, arXiv:1908.02289 (2019).

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