Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Série APC-TH
Domaines gr-qc
Date Mardi 17 Mai 2022
Heure 13:30
Institut APC
Salle seminar room 483A, contact for Zoom meeting details
Nom de l'orateur Santoni
Prenom de l'orateur Luca
Addresse email de l'orateur
Institution de l'orateur ICTP
Titre Hidden symmetries of black holes
Résumé I will discuss classes of hidden symmetries of gravity and their consequences for black holes and compact objects. It is well known that asymptotically flat black holes in general relativity have a vanishing static tidal response (i.e., zero Love numbers). In the talk, I will first show that this is the result of a hidden structure of ladder symmetries governing static (spin 0,1,2) perturbations around black holes, and I will discuss the underlying geometric origin. I will also present examples of hidden symmetries and dualities at finite frequency and their consequences for quasinormal modes. I will finally briefly present an effective field theory for perturbations around black holes in scalar-tensor theories and discuss how to connect the effective couplings to possible deviations in the observed ringdown frequencies.
Numéro de preprint arXiv
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