Dr. Emanuel Malek (HU Berlin)

Title: Kaluza-Klein Spectrometry from Exceptional Field Theory

Abstract:

In this talk, I will show how exceptional field theory gives us a powerful new method for computing the Kaluza-Klein spectrum of string theory compactifications. This includes geometries with little to no remaining symmetries, hardly accessible to standard methods. I will discuss various applications of this method, including tachyonic Kaluza-Klein modes amongst the higher levels of the spectrum of a prominent non-supersymmetric AdS_4 vacuum, as well as a proof of stability for a class of non-supersymmetric AdS_4 vacua. Finally, I will also discuss applications to supersymmetric AdS vacua and the AdS/CFT correspondence.