Holographic Cusped Wilson loops in $q$-deformed $AdS_5\times S^5$ Spacetime

TL;DR

This paper investigates minimal surfaces with cusped boundaries in q-deformed AdS5×S5 spacetime, revealing divergence structures and deriving the cusp anomalous dimension, connecting to dual Wilson loops in the deformed gauge theory.

Contribution

It provides a detailed analysis of cusped Wilson loops via minimal surfaces in q-deformed AdS, including divergence behavior and the computation of the anomalous dimension.

Findings

Identified both logarithmic squared and logarithmic divergences in the minimal surface area.

Found the logarithmic squared divergence cannot be removed by standard methods.

Derived the cusp anomalous dimension, which smoothly recovers the undeformed case as deformation vanishes.

Abstract

In this paper, minimal surface in $q$-deformed $AdS_5\times S^5$ with boundary a cusp is studied in detail. This minimal surface is dual to cusped Wilson loop in the dual field theory. We found that the area of the minimal surface has both logarithmic squared divergence and logarithmic divergence. The logarithmic squared divergence can not be removed by either Legendre transformation or the usual geometric substraction. We further make analytic continuation to the Minkowski signature %for the case without the jump and take the limit such that the two edges of the cusp become light-like and extract anomalous dimension from the coefficient of the logarithmic divergence. This anomalous dimension goes back smoothly to the results in the undeformed case when we take the limit that the deformation parameter goes to zero.