Quantization of the Type II superstring in a curved six-dimensional background Original Research Article

A sigma model action with N=2 D=6 superspace variables is constructed for the Type II superstring compactified to six curved dimensions with Ramond–Ramond flux. The action can be quantized since the sigma model is linear when the six-dimensional space-time is flat. When the six-dimensional space-time is AdS3×S3, the action reduces to one found earlier with Vafa and Witten.