Speaker
Camilla Lavino
Description
I will present a way to use Exceptional Field Theory to compute the spectrum of Kaluza-Klein modes for a set of backgrounds that can be uplifted from a 5-dimensional theory through consistent truncation. To this end, I will employ the formulation of field theory in terms of $L_{\infty}$ algebras and homotopy transfer, which maps the gauge redundant fields of supergravity to a theory with just physical modes. Thanks to this formulation it is possible to obtain the physical spectrum with a systematic procedure that allows one to untangle the non physical modes via the Higgs mechanism.