# Uplifts of maximal supergravities and transitions to non-geometric vacua

## TL;DR

This paper introduces a new method for deriving consistent supergravity backgrounds by taking singular limits in moduli space, revealing locally geometric and non-geometric vacua, and providing uplift to eleven dimensions for certain gaugings.

## Contribution

A novel procedure for obtaining supergravity backgrounds through singular limits, expanding the landscape of known vacua including non-geometric configurations.

## Key findings

- Generated vacua are often locally geometric or non-geometric.
- Applied the method to specific backgrounds, revealing asymmetric orbifolds and Q-flux configurations.
- Provided uplift to eleven dimensions for all four-parameter gaugings.

## Abstract

We describe a new procedure to obtain consistent backgrounds that uplift vacua and deformations of various maximal gauged supergravities by taking a known solution and performing singular limits along the moduli space of the corresponding 4-dimensional theory. We then apply this procedure to the S^3 x H^{2,2} background that provides the uplift of 4-dimensional Minkowski vacua of maximal supergravity with gauge group [SO(4) x SO(2,2)] $\ltimes$ R^{16}. We find that the newly generated vacua are generally only locally geometric and correspond to asymmetric orbifolds, Q-flux backgrounds or combinations thereof. We also provide the uplift to eleven dimensions of all the four-parameter Cremmer-Scherk-Schwarz gaugings.