# Stringy AdS3 from the Worldsheet

## TL;DR

This paper explores a tensionless limit of bosonic strings on AdS3 with H-flux, revealing an infinite tower of massless higher spin fields at a specific level, indicating a novel stringy phase.

## Contribution

It identifies a new tensionless limit in the bosonic string on AdS3, characterized by an infinite spectrum of massless higher spin states at k=3.

## Key findings

- Infinite massless higher spin fields at k=3
- Distinct tensionless limit from symmetric orbifold models
- Continuum of light states in the spectrum

## Abstract

We investigate the behaviour of the bosonic string on AdS3 with H-flux at stringy scales, looking in particular for a `tensionless' limit in which there are massless higher spin gauge fields. We do this by revisiting the physical spectrum of the sl(2,R)$_k$ WZW model and considering the limit in which k becomes small. At k=3 we find that there is an infinite stringy tower of massless higher spin fields which are part of a continuum of light states. This can be viewed as a novel tensionless limit, which appears to be distinct from that inferred from the symmetric orbifold description of superstring AdS3 vacua.