Stochastic collapse

Tays Miranda; Emmanuel Frion; David Wands

doi:10.1088/1475-7516/2020/01/026

Stochastic collapse

Tays Miranda, Emmanuel Frion, David Wands

Institute of Cosmology & Gravitation

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Abstract

We investigate cosmological models described by a scalar field with an exponential potential, and apply the stochastic formalism, which allows us to study how quantum field fluctuations give rise to stochastic noise. This modifies the classical dynamics of the scalar field at large scales, above a coarse-graining scale. In particular we explore how quantum field fluctuations perturb the equation of state on large scales which can lead to a quantum instability of the classical collapse solution below the Planck scale in the case of a pressureless collapse.

Original language	English
Article number	026
Number of pages	24
Journal	Journal of Cosmology and Astroparticle Physics
Volume	2020
Issue number	01
DOIs	https://doi.org/10.1088/1475-7516/2020/01/026
Publication status	Published - 9 Jan 2020

Keywords

alternatives to inflation
inflation

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10.1088/1475-7516/2020/01/026

Stochastic collapse AAM
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Cite this

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AB - We investigate cosmological models described by a scalar field with an exponential potential, and apply the stochastic formalism, which allows us to study how quantum field fluctuations give rise to stochastic noise. This modifies the classical dynamics of the scalar field at large scales, above a coarse-graining scale. In particular we explore how quantum field fluctuations perturb the equation of state on large scales which can lead to a quantum instability of the classical collapse solution below the Planck scale in the case of a pressureless collapse.

KW - alternatives to inflation

KW - inflation

UR - https://arxiv.org/abs/1910.10000

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Stochastic collapse

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Keywords

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