More on the tensionless limit of pure-Ramond-Ramond AdS3/CFT2

TL;DR

This paper derives and analyzes equations describing the tensionless limit of string spectra in AdS3/CFT2 with RR flux, providing numerical solutions and insights into the spectrum's behavior.

Contribution

It offers a detailed derivation from mirror TBA equations and introduces a numerical approach for the tensionless limit of strings on AdS3/CFT2.

Findings

Derived equations from mirror TBA for tensionless strings

Developed a numerical algorithm for solving these equations

Provided explicit numerical results and interpretations

Abstract

In a recent letter we presented the equations which describe tensionless limit of the excited-state spectrum for strings on $AdS_3\times S^3\times T^4$ supported by Ramond-Ramond flux, and their numerical solution. In this paper, we give a detailed account of the derivation of these equations from the mirror TBA equations proposed by Frolov and Sfondrini, discussing the contour-deformation trick which we used to obtain excited-state equations and the tensionless limit. We also comment at length on the algorithm for the numerical solution of the equations in the tensionless limit, and present a number of explicit numerical results, as well as comment on their interpretation.