Statut  Confirmé 
Série  RENCTHEO 
Domaines  hepth 
Date  Jeudi 3 Décembre 2020 
Heure  15:00 
Institut  IHP 
Salle  Zoom 
Nom de l'orateur  Kaidi 
Prenom de l'orateur  Justin 
Addresse email de l'orateur  jkaidi [at] scgp [dot] stonybrook [dot] edu 
Institution de l'orateur  Simons Center for Geometry snd Physics 
Titre  Adventures in NonSupersymmetric String Theory 
Résumé  It has long been known that there exist strings with supersymmetry on the world sheet, but not in spacetime. These include the wellknown Type 0 strings, as well as a series of seven heterotic strings, all of which are obtained by imposing unconventional GSO projections. Besides these classic examples though, relatively little is known about the full space of nonSUSY theories. One of the reasons why nonSUSY strings have remained understudied is the fact that nearly all of them have closed string tachyons, and hence do not admit tendimensional flat space as a stable vacuum. The goal of this talk is twofold. First, using recent advances in condensed matter theory, we will reinterpret GSO projections in terms of topological phases of matter, thereby providing a framework for the classification of nonSUSY strings. Having done so, we will show that for all nonSUSY theories in which a tachyon exists, it can be condensed to give a stable lowerdimensional vacuum. In many cases, these stable vacua will be twodimensional string theories already known in the literature. 
Numéro de preprint arXiv  
Commentaires  Zoom link: https://zoom.us/j/96224045445, passwd=1234 
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