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Hidden symmetries of gravity

Mar. 24 - 14:30 - 2022

Speaker: Luca Santoni (ICTP, Trieste)

Title: Hidden symmetries of gravity


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.

Room: Sala de Reuniões e Seminários (2-8.3) (2nd Floor of Physics Building)

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