On the initial conditions and solutions of the semiclassical Einstein equations in a cosmological scenario

Understand

In this paper we shall discuss the backreaction of a massive quantum scalar field on the curvature, the latter treated as a classical field.

• Furthermore, we shall deal with this problem in the realm of cosmological spacetimes by analyzing the Einstein equations in a semiclassical fashion.
• More precisely, we shall show that, at least on small intervals of time, solutions for this interacting system exist.
• This result will be achieved providing an iteration scheme and showing that the series, obtained starting from the massless solution, converges in the appropriate Banach space.