4 papers
Perturbative semiclassical entropy of dynamical black holes
Avinandan Mondal, Kartik Prabhu
We consider perturbative quantum gravity as a quantum field theory of linearized metric perturbation on an asymptotically flat spacetime with a bifurcate Killing horizon. We includ…
Vacua and infrared radiation in de Sitter quantum field theory
Jonah Kudler-Flam, Kartik Prabhu, Gautam Satishchandran
We analyze the asymptotic behavior of quantum fields and perturbative quantum gravity in de Sitter space. We show that the necessary and sufficient condition for the existence of a…
Infrared finite scattering theory: Amplitudes and soft theorems
Kartik Prabhu, Gautam Satishchandran
Any non-trivial scattering with massless fields in four spacetime dimensions will generically produce an out-state with memory. Scattering with any massless fields violates the sta…
Infrared finite scattering theory: Scattering states and representations of the BMS group
Kartik Prabhu, Gautam Satishchandran
Any non-trivial scattering with any massless fields in four spacetime dimensions will generically produce an "out" state with memory which gives rise to infrared divergences in the…