$T\bar{T}$-deformed 2D Yang-Mills at large N: collective field theory and phase transitions

Abstract

We consider the $T\bar{T}$ deformation of 2d large $N$ YM theory on a cylinder, sphere and disk. The collective field theory Hamiltonian for the deformed theory is derived and the particular solutions to the equations of motion of the collective theory are found for the sphere. The account of the non-perturbative branch of the solution amounts to the first-order phase transition at the $(A,\tau )$ plane. We analyze the third-order phase transition in the deformed theory on the disk and derive the critical area as a function of the boundary holonomy. A kind of Hagedorn behavior in the spectral density is discussed.

arXiv comment22 pages, 5 figures; v3: minor corrections

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