Speaker
Omkar Shetye
(Instytut Fizyki Teoretycznej, Uniwersytet Jagielloński)
Description
Inspired by similar constructions for AdS blackholes, we propose a geometric method that computes the Schwinger-Keldysh effective action describing the dynamics of a localised observer in de Sitter spacetime. This action describes the dissipative physics of radiation reaction of the observer as well as the Hawking radiation seen by it. Our geometric construction implicitly encodes the fluctuation-dissipation theorem at a non-linear level. We perform various checks on our computation matching the flat space limit to previous calculations and verifying the consistency with symmetry arguments.
Author
Omkar Shetye
(Instytut Fizyki Teoretycznej, Uniwersytet Jagielloński)