Strong coupling universality at large N for pure CFT thermodynamics in 2+1 dimensions

Author:

DeWolfe Oliver,Romatschke Paul

Abstract

Abstract Pure CFTs have vanishing β-function at any value of the coupling. One example of a pure CFT is the O(N) Wess-Zumino model in 2+1 dimensions in the large N limit. This model can be analytically solved at finite temperature for any value of the coupling, and we find that its entropy density at strong coupling is exactly equal to $$ \frac{31}{35} $$ 31 35 of the non-interacting Stefan-Boltzmann result. We show that a large class of theories with equal numbers of N-component fermions and bosons, supersymmetric or not, for a large class of interactions, exhibit the same universal ratio. For unequal numbers of fermions and bosons we find that the strong-weak thermodynamic ratio is bounded to lie in between $$ \frac{4}{5} $$ 4 5 and 1.

Publisher

Springer Science and Business Media LLC

Subject

Nuclear and High Energy Physics

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