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 ]


Seminars this week in series RENC-THEO
[ scheduler view ]

Thursday 21 September 2017, 10:00 at IHP, Room 314 RENC-THEO (Rencontres Théoriciennes) hep-th
James Drummond ( Southampton University ) Quantum gravity from conformal field theory
Abstract: I will describe how to recast perturbative quantum gravity using non-perturbative techniques from conformal field theory, focussing on the case of N=4 super Yang-Mills theory. By resolving the degeneracy among double trace operators at large N we are able to bootstrap one-loop supergravity corrections from the OPE of the CFT.

Thursday 21 September 2017, 11:45 at IHP, Room 314 RENC-THEO (Rencontres Théoriciennes) hep-th
Miguel Paulos ( LPTENS ) The S-matrix strikes back
Abstract: In this talk I will describe recent work aiming to reinvigorate the 50 year old S-matrix program, which seeks to constrain scattering of massive particles non-perturbatively. I will begin by considering quantum fields in anti-de Sitter space and show that one can extract information about the S-matrix by considering correlators in conformally invariant theories. The latter can be studied with "bootstrap" techniques, which allow us to constrain the S-matrix. I will also show that this can be done directly, without using the CFT crutch, by using crossing symmetry and unitarity and a particular ansatz. In this way we derive universal bounds on QFTs in 2,3 and 4 dimensions.

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 ]