| Abstract: |
String theory on AdS3 x S3 x T4 with one unit of NS-NS flux is exactly dual to the symmetric orbifold of T4. I will explain how to go away from this tensionless point by switching on infinitesimal RR flux, and how this can be described, in terms of the dual symmetric orbifold, by an integrable deformation. In the second half of the talk I will explain similar exact dualities for other backgrounds, in particular for AdS3 x S3 x S3 x S1, but also for purely bosonic string theories on AdS3.
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