Vertex operators in background with NS–NS flux using Berkovits–Vafa–Witten variables

Vertex operators for AdS3 background with Ramond-Ramond flux

In order to study vertex operators for the Type IIB superstring on AdS space, we derive supersymmetric constraint equations for the vertex operators in AdS3 × S backgrounds with Ramond-Ramond flux, using Berkovits-Vafa-Witten variables. These constraints are solved to compute the vertex operators and show that they satisfy the linearized D = 6, N = (2, 0) equations of motion for a supergravity ...

Vertex operators in AdS 3 × S 3 Background with NS - NS Flux using Berkovits - Vafa - Witten Variables

String equations for the vertex operators of type IIB on AdS3×S 3 background with NS-NS flux are calculated using Berkovits-Vafa-Witten formalism. With suitable field definitions, the linearized field equations for six-dimensional supergravity and a tensor multiplet on AdS3 × S 3 are recovered from these. We also discuss the massless degrees of freedom that survive the S3 Kaluza-Klein compactif...

Flux Stabilization of D-branes in NSNS Melvin Background

In this paper we reexamine the D-brane spectrum in the Melvin background with non-constant NSNS B-field from the viewpoint of its world-volume and string world-sheet theory. We find that the stable D2-D0 bound state exists even though it does not wrap any nontrivial cycles. We show that this system is stabilized by the presence of the NSNS B-field and the magnetic flux F . Moreover from the non...

Vertex Operators for Ads3 with Ramond Background

This review gives results on vertex operators for the Type IIB superstring in an AdS3 x S3 background with Ramond-Ramond flux, which were presented at Strings 2000. Constraint equations for these vertex operators are derived, and their components are shown to satisfy the supergravity linearized equations of motion for the six-dimensional (2,0) theory of a supergravity and tensor multiplet expan...

Superstring Vertex Operators in an AdS 5 × S 5 Background