# New boundary conditions for (extended) $\mathrm{AdS}_3$ supergravity

## TL;DR

This paper develops the most general boundary conditions for extended supergravity in AdS3, revealing their asymptotic symmetries and extending classical boundary conditions to supersymmetric cases.

## Contribution

It introduces the broadest boundary conditions for $ ext{AdS}_3$ supergravity with various supersymmetries and derives their associated asymptotic symmetry algebras.

## Key findings

- Asymptotic symmetry algebras are two copies of $ ext{osp}(1|2)_k$ and $ ext{osp}(2|2)_k$.
- Supersymmetric extensions of Brown-Henneaux and Troessaert boundary conditions are constructed.
- Supersymmetric extensions of Avery-Poojary-Suryanarayana boundary conditions are obtained.

## Abstract

In this work, we build the most general boundary conditions for $\mathcal N=\left(1,1\right)$ and $\mathcal N=\left(2,2\right)$ extended supergravity. We show that for the loosest set of boundary conditions, their asymptotic symmetry algebras are two copies of the $\mathfrak{osp}\left(1\mid 2\right)_k$ and $\mathfrak{osp}\left(2\mid 2\right)_k$ algebra, respectively. Then, we restrict the gauge fields on the boundary conditions in order to obtain supersymmetric extensions of the Brown-Henneaux and Troessaert boundary conditions. Furthermore, for $\mathcal N=1$ and $\mathcal N=2$ (extended) supergravity we show the supersymmetric extensions of Avery-Poojary-Suryanarayana boundary conditions.