Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

The SEMPARIS seminar webserver hosts annoucements of all seminars taking place in Paris area, in all topics of physics, mathematics and computer science. It allows registered users to receive a selection of announcements by email on a daily or weekly basis, and offers the possibility to archive PDF or Powerpoint files, making it available to the scientific community.   [ More information ]


Upcoming Seminars in series RENC-THEO
[ scheduler view ]

Thursday 3 December 2020, 15:00 at IHP, Zoom
( The zoom link will be posted here one hour before the talk. )
RENC-THEO (Rencontres Théoriciennes) hep-th
Justin Kaidi ( Simons Center for Geometry snd Physics ) Adventures in Non-Supersymmetric String Theory
Abstract: It has long been known that there exist strings with supersymmetry on the world sheet, but not in spacetime. These include the well-known 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 non-SUSY theories. One of the reasons why non-SUSY strings have remained understudied is the fact that nearly all of them have closed string tachyons, and hence do not admit ten-dimensional flat space as a stable vacuum. The goal of this talk is two-fold. 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 non-SUSY strings. Having done so, we will show that for all non-SUSY theories in which a tachyon exists, it can be condensed to give a stable lower-dimensional vacuum. In many cases, these stable vacua will be two-dimensional string theories already known in the literature.

Thursday 21 January 2021, 11:00 at IHP, (video) RENC-THEO (Rencontres Théoriciennes) hep-th
Rajesh Gopakumar ( ICTS Bangalore ) TBA

Thursday 28 January 2021, 11:00 at IHP, (video) RENC-THEO (Rencontres Théoriciennes) hep-th
Eric Perlmutter ( Caltech & IPhT ) TBA

seminars from series at institute
in subject with field matching

[ Postscript Poster Aide | PDF Poster Aide | RSS Thread | ICal Format Aide ]

You are invited to subscribe to SEMPARIS mailing lists in order to receive selected announcements by email.

[ Annonces ]    [ Abonnements ]    [ Archive ]    [ Aide ]    [ ]
[ English version ]