Statut  Confirmé 
Série  RENCTHEO 
Domaines  hepth 
Date  Jeudi 15 Novembre 2018 
Heure  10:00 
Institut  IHP 
Salle  201 
Nom de l'orateur  O'bannon 
Prenom de l'orateur  Andy 
Addresse email de l'orateur  
Institution de l'orateur  University of Southampton 
Titre  Wilson Surface Central Charge 
Résumé  Mtheory is currently our best candidate for a theory of everything, but remains mysterious. We know Mtheory has M2 and M5branes. The lowenergy theory on a stack of coincident M2branes is wellunderstood: it is maximally supersymmetric ChernSimonsmatter theory. However, the lowenergy theory on a stack of coincident M5branes remains poorlyunderstood: it is a maximally supersymmetric theory of selfdual strings with zero tension. In this talk I will discuss one type of probe of the M5brane theory, namely selfdual strings with infinite tension. These play a role analogous to Wilson lines in gauge theories, but are twodimensional surfaces rather than lines, and hence are called Wilson surfaces. I will describe holographic calculations of entanglement entropy associated with these infinitetension selfdual strings, from which we extract a key parameter characterizing them, their central charge. This provides a count of the number of massless degrees of freedom living on them, and thus may shed light on some of the fundamental degrees of freedom of Mtheory. 
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