2019/05/22 by Oliver DeWolfe, Paul Romatschke · 1 citation
Physics and Astronomy · #hep-th #cond-mat.str-el #nucl-th
paper · pdf · doi:10.1007/jhep10(2019)272
11 pages, 2 figures; v2: references added
arxiv created 2019/05/22 · arxiv updated 2020/01/08
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 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 4/5 and 1.