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Title: Backreaction from non-zero mass conformally coupled scalar fields and the quantum creation of the Universe
Author: Mozota Frauca, Àlvaro
Director/Tutor: Verdaguer Oms, Enric, 1950-
Keywords: Cosmogonia
Relativitat (Física)
Treballs de fi de grau
Relativity (Physics)
Bachelor's thesis
Issue Date: Jun-2015
Abstract: The purpose of this paper is to study the homogeneous backreaction of non-zero mass conformally coupled scalar fields on a cosmological background, including at spacetime, at one-loop order. For this study, the semiclassical Friedmann equation is solved using a method called order reduction. For a nearly at background we get a scale factor that evolves to a stationary scale factor depending on the initial quantum state. We also prove that a de Sitter scale factor is also a mathematical solution of the semiclassical Friedmann equation, and we argue this is a runaway type solution.
Note: Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Any: 2015, Tutor: Enric Verdaguer
Appears in Collections:Treballs Finals de Grau (TFG) - Física

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