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arXiv · 2009.07334

Lattice N=4 super Yang-Mills at Strong Coupling

Simon Catterall·Joel Giedt·Goksu can Toga
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Abstract

In this paper we present results from numerical simulations of N=4 super Yang-Mills for two color gauge theory over a wide range of 't Hooft coupling $0<\lambda\le 30$ using a supersymmetric lattice action \cite{Catterall:2009it}. Numerical study of this lattice theory has been stymied until recently by both sign problems and the occurrence of lattice artifact phases at strong coupling. We have recently developed a new action that appears capable of solving both problems. The resulting action possesses just $SU(2)$ rather than $U(2)$ gauge symmetry. By explicit computations of the fermion Pfaffian we present evidence that the theory possesses no sign problem and exists in a single phase out to arbitrarily strong coupling. Furthermore, preliminary work shows that the logarithm of the supersymmetric Wilson loop varies as the square root of the 't Hooft coupling $\lambda$ for large $\lambda$ in agreement with holographic predictions.

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Simon Catterall, Joel Giedt, Goksu can Toga. 2020-09-15. Lattice N=4 super Yang-Mills at Strong Coupling. https://doi.org/10.1007/jhep12(2020)140

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