On the $T\bar{T}$ deformation of the compactified boson and its interpretation in Lattice Gauge Theory

Abstract

We study the effective string description of space-like Polyakov loop correlators at finite temperature with the goal of describing the behaviour of the space--like string tension in the vicinity of the deconfinement transition. To this end we construct the partition function of the Nambu-Goto effective string theory in presence of a compact transverse direction of length $L$ equal to the inverse temperature. We then show that, under particular conditions, our result can be interpreted as the partition function of the $T\bar{T}$ deformation of the 2d quantum field theory describing a compactified bosonic field and that this mapping allows a deeper insight on the behaviour of the space-like observables of the theory. In particular we show, by imposing that the spectrum of the model obeys the inviscid Burgers equation, that the $T\bar{T}$ deformations follow well defined trajectories in the parameter space $(\sigma ,L)$ of the model, where $\sigma$ is the string tension, which are characterized by a constant value of the dimensionless compactification radius $\rho =L\sqrt{\sigma /2\pi }$. We discuss the potential usefulness of these results for studying the space--like string tension of the underlying Lattice Gauge Theory and its behaviour across the deconfinement transition.

arXiv comment28 pages, 2 figures. V2: expanded comments in sections 2.2, 2.3 and 4

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Cited by in corpus (6)

• A pedagogical review on solvable irrelevant deformations of 2d quantum field theory
• $T\overline{T}$ deformation in SCFTs and integrable supersymmetric theories
• Sampling the lattice Nambu-Goto string using Continuous Normalizing Flows
• Fine corrections in the effective string describing SU(2) Yang-Mills theory in three dimensions
• $T\overline{T}$-deformation of $q$-Yang-Mills theory
• Deforming the ODE/IM correspondence with $\mathrm{T}\bar{\mathrm{T}}$