Asymptotic Symmetries of String Theory on AdS3 X S3 with Ramond-Ramond Fluxes

TL;DR

This paper constructs the asymptotic symmetry algebra of string theory on AdS3 x S3 with Ramond-Ramond fluxes, revealing its conformal and superconformal structures crucial for understanding black hole microstates.

Contribution

It explicitly constructs the R-symmetry and Virasoro charges in the worldsheet theory, advancing the understanding of boundary symmetries in this string background.

Findings

Explicit construction of R-symmetry and Virasoro charges

Identification of boundary superconformal algebra

Implications for black hole entropy counting

Abstract

String theory on AdS3 space-times with boundary conditions that allow for black hole states has global asymptotic symmetries which include an infinite dimensional conformal algebra. Using the conformal current algebra for sigma-models on PSU(1,1|2), we explicitly construct the R-symmetry and Virasoro charges in the worldsheet theory describing string theory on AdS3 X S3 with Ramond-Ramond fluxes. We also indicate how to construct the full boundary superconformal algebra. The boundary superconformal algebra plays an important role in classifying the full spectrum of string theory on AdS3 with Ramond-Ramond fluxes, and in the microscopic entropy counting in D1-D5 systems.