# M-theory Superstrata and the MSW String

## TL;DR

This paper constructs a detailed correspondence between MSW and D1-D5 CFTs, providing explicit supergravity solutions that expand the known landscape of horizonless microstate geometries in five-dimensional supergravity.

## Contribution

It establishes a new map between MSW and D1-D5 CFT sectors and constructs the largest class of explicit supergravity solutions dual to MSW microstates.

## Key findings

- Largest known class of solutions dual to MSW microstates
- Demonstrates larger families of smooth horizonless solutions in supergravity
- Explicit construction of supergravity solutions for MSW CFT states

## Abstract

The low-energy description of wrapped M5 branes in compactifications of M-theory on a Calabi-Yau threefold times a circle is given by a conformal field theory studied by Maldacena, Strominger and Witten and known as the MSW CFT. Taking the threefold to be T$^6$ or K3xT$^2$, we construct a map between a sub-sector of this CFT and a sub-sector of the D1-D5 CFT. We demonstrate this map by considering a set of D1-D5 CFT states that have smooth horizonless bulk duals, and explicitly constructing the supergravity solutions dual to the corresponding states of the MSW CFT. We thus obtain the largest known class of solutions dual to MSW CFT microstates, and demonstrate that five-dimensional ungauged supergravity admits much larger families of smooth horizonless solutions than previously known.