Type IIB superstring action in AdS_5 x S^5 background

TL;DR

This paper constructs a covariant, kappa-symmetric superstring action for Type IIB strings in the AdS_5 x S^5 background, using a coset superspace sigma-model approach.

Contribution

It introduces a unique superstring action on AdS_5 x S^5 that maintains covariance and kappa-symmetry, extending previous formulations to this specific background.

Findings

The action is covariant and kappa-symmetric.

It reduces correctly to known bosonic and flat space limits.

The formulation is based on the coset superspace SU(2,2|4) / SO(4,1) x SO(5).

Abstract

We construct the covariant kappa-symmetric superstring action for a type IIB superstring on AdS_5 x S^5 background. The action is defined as a 2d sigma-model on the coset superspace SU(2,2|4) / SO(4,1) x SO(5) and is shown to be the unique one that has the correct bosonic and flat space limits.