TY - JOUR

T1 - Long range, large charge, large N

AU - Giombi, Simone

AU - Helfenberger, Elizabeth

AU - Khanchandani, Himanshu

N1 - Publisher Copyright:
© 2023, The Author(s).

PY - 2023/2

Y1 - 2023/2

N2 - We study operators with large charge j in the d-dimensional O(N) model with long range interactions that decrease with the distance as 1/rd+s, where s is a continuous parameter. We consider the double scaling limit of large N, large j with j/ N= ĵ fixed, and identify the semiclassical saddle point that captures the two-point function of the large charge operators in this limit. The solution is given in terms of certain ladder conformal integrals that have recently appeared in the literature on fishnet models. We find that the scaling dimensions for general s interpolate between ∆j∼(d−s)2j at small ĵ and ∆j∼(d+s)2j at large ĵ , which is a qualitatively different behavior from the one found in the short range version of the O(N) model. We also derive results for the structure constants and 4-point functions with two large charge and one or two finite charge operators. Using a description of the long range models as defects in a higher dimensional local free field theory, we also obtain the scaling dimensions in a complementary way, by mapping the problem to a cylinder in the presence of a chemical potential for the conserved charge.

AB - We study operators with large charge j in the d-dimensional O(N) model with long range interactions that decrease with the distance as 1/rd+s, where s is a continuous parameter. We consider the double scaling limit of large N, large j with j/ N= ĵ fixed, and identify the semiclassical saddle point that captures the two-point function of the large charge operators in this limit. The solution is given in terms of certain ladder conformal integrals that have recently appeared in the literature on fishnet models. We find that the scaling dimensions for general s interpolate between ∆j∼(d−s)2j at small ĵ and ∆j∼(d+s)2j at large ĵ , which is a qualitatively different behavior from the one found in the short range version of the O(N) model. We also derive results for the structure constants and 4-point functions with two large charge and one or two finite charge operators. Using a description of the long range models as defects in a higher dimensional local free field theory, we also obtain the scaling dimensions in a complementary way, by mapping the problem to a cylinder in the presence of a chemical potential for the conserved charge.

KW - 1/N Expansion

KW - Nonperturbative Effects

KW - Scale and Conformal Symmetries

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U2 - 10.1007/JHEP01(2023)166

DO - 10.1007/JHEP01(2023)166

M3 - Article

AN - SCOPUS:85147146595

SN - 1126-6708

VL - 2023

JO - Journal of High Energy Physics

JF - Journal of High Energy Physics

IS - 1

M1 - 166

ER -