Statut  Confirmé 
Série  LPTENSHE 
Domaines  hepth 
Date  Mercredi 31 Mai 2023 
Heure  11:00 
Institut  LPENS 
Salle  TBA 
Nom de l'orateur  Papadoulaki 
Prenom de l'orateur  Olga 
Addresse email de l'orateur  
Institution de l'orateur  Perimeter Inst 
Titre  Microstates of a 2d Black Hole in string theory 
Résumé  I will first introduce the duality between the singlet sector of Matrix quantum mechanics (MQM) and the c=1 Liouville String Theory. Then, I will review various descriptions of the 2d Black Hole. Afterwards, I will analyse models of MQM in the double scaling limit that contain nonsinglet states. The finite temperature partition function of such systems contains nontrivial winding modes (vortices) and is expressed in terms of a group theoretic sum over representations. Subsequently, I will focus on the model of KazakovKostovKutasov when the first winding mode is dominant. In the limit of large representations (continuous Young diagrams), and depending on the values of the parameters of the model such as the compactification radius and the string coupling, the dual geometric background corresponds either to that of a long string (winding mode) condensate or the 2d (nonsupersymmetric) semiclassical Black Hole competing with the thermal linear dilaton background. In the matrix model one is free to tune these parameters and explore various regimes of the phase diagram. I will show how this construction allows one to identify the origin of the microstates of the long string condensate/2d Black Hole arising from the non trivial representations. Finally, I will present some future directions. 
Numéro de preprint arXiv  
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