Characters of different secular effects in various patches of de Sitter space

by Prof. Emil T. Akhmedov (Moscow Institute of Physics and Technology)

Thursday 20 Dec 2018, 15:00 → 16:00 Europe/Rome

Aula Teorici (DIFA)

There are at least three different types of secular effects in two--point correlation functions in scalar quantum field theories in de Sitter space--time. Two among them are present even for theories with any mass and are universal practically to any non--stationary situation in any quantum field theory. Another one is specific only to the de Sitter space massless minimally coupled scalar field. Furthermore there are secular effects in multiple point correlation functions in de Sitter space quantum field theories for low enough mass. They are also specific to de Sitter space. In the talk I will discuss the differences between the secular effects in two--point functions. Also I will discuss their revelation in different patches of de Sitter space--time (global, expanding and contracting Poinare) and under different initial conditions.