Ramond-Ramond Couplings of Noncommutative Branes

TL;DR

This paper derives the couplings of noncommutative type II string theory branes to Ramond-Ramond backgrounds, demonstrating their equivalence to commutative descriptions and extending previous results to non-BPS cases.

Contribution

It provides a comprehensive derivation of Ramond-Ramond couplings for noncommutative branes, including BPS and non-BPS, and establishes their equivalence to known commutative couplings.

Findings

Couplings for noncommutative branes are explicitly derived.

Equivalence between noncommutative and commutative descriptions is demonstrated.

Extensions to non-BPS branes are provided.

Abstract

We obtain the couplings of noncommutative branes of type II string theories to constant Ramond-Ramond backgrounds, for BPS as well as non-BPS branes, in the background-independent description. For the BPS branes, we also generalize these couplings to other descriptions, and thereby argue their equivalence to the known couplings in the commutative description. The first part is a review of earlier work while the second part contains some additional observations.