Partition functions of the tensionless string

Understand

We consider string theory on $\text{AdS}_3 \times \text{S}^3 \times \mathbb{T}^4$ in the tensionless limit, with one unit of NS-NS flux.

• This theory is conjectured to describe the symmetric product orbifold CFT.
• We consider the string on different Euclidean backgrounds such as thermal $\text{AdS}_3$, the BTZ black hole, conical defects and wormhole geometries.
• In simple examples we compute the full string partition function.