Princeton University Gravity Initiative Virtual Seminar Series

Abstract: During its ringdown phase, a perturbed black-hole produces radiation at characteristic (complex) frequencies, much like the normal frequencies of a guitar string. These quasinormal frequencies carry information about the geometry of the black hole. In this talk I will review the problem of finding quasinormal frequencies and discuss recent work which realizes quasinormal frequencies as eigenvalues of a natural non-self-adjoint operator associated with time evolution.