Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série RENC-THEO
Domaines hep-th
Date Jeudi 20 Décembre 2018
Heure 10:00
Institut IHP
Salle 201
Nom de l'orateur Gaberdiel
Prenom de l'orateur Matthias
Addresse email de l'orateur
Institution de l'orateur ETH Zuerich
Titre The worldsheet dual of the symmetric orbifold CFT
Résumé Superstring theory on AdS3×S3×T4 with the smallest amount of NS-NS flux (k = 1) is shown to be dual to the spacetime CFT given by the large N limit of the free symmetric product orbifold Sym_N (T4). To define the worldsheet theory at k = 1, we employ the hybrid formalism in which the AdS3×S3 part is described by the psu(1, 1|2)_1 WZW model (which is well defined). Unlike the case for k ≥ 2, it turns out that the string spectrum at k = 1 does not exhibit the long string continuum, and perfectly matches with the large N limit of the symmetric product. We also demonstrate that the fusion rules of the symmetric orbifold are reproduced from the worldsheet perspective. Our proposal therefore affords a tractable worldsheet description of a tensionless limit in string theory, for which the dual CFT is also explicitly known.
Numéro de preprint arXiv
Commentaires [based on joint work with Lorenz Eberhardt and Rajesh Gopakumar]
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