Non-Supersymmetric AdS from String Theory

Understand

We construct non-supersymmetric AdS3 solutions of the O(16)xO(16) heterotic string.

• Most of the backgrounds have a classical worldsheet definition but are quantum string vacua in the sense that string loop corrections change the curvature of spacetime.
• At one-loop, the change in the cosmological constant is positive but never sufficient to uplift to de Sitter space.
• By computing the spectrum of spacetime scalars, we show that there are no tachyons below the BF bound.