54 citations · 75 across the 2 of their papers we have counts for
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Validity of the semiclassical approximation during the preheating phase of chaotic inflation
Paul R. Anderson, Carmen Molina-Paris, Dillon H. Sanders
The semiclassical approximation has frequently been used to describe the initial stage of particle production, often called preheating, which occurs after the inflationary epoch in…
Cosmological Horizon Modes and Linear Response in de Sitter Spacetime
Paul R. Anderson, Carmen Molina-Paris, Emil Mottola
Linearized fluctuations of quantized matter fields and the spacetime geometry around de Sitter space are considered in the case that the matter fields are conformally invariant. Ta…
Linear Response and the Validity of the Semi-Classical Approximation in Gravity
Paul R. Anderson, Carmen Molina-Paris, Emil Mottola
We propose a quantitative test for the validity of the semi-classical approximation in gravity, namely that the solutions to the semi-classical equations should be stable to linear…
Energy-Momentum Tensor and Particle Creation in the de Sitter Universe
Carmen Molina-Paris
For a quantum field in a curved background the choice of the vacuum state is crucial. We exhibit a vacuum state in which the expectation values of the energy and pressure allow an…