Collapse driven by a scalar field without final singularity

Abstract

We explore a collapsing cosmology driven by a scalar field which is minimally coupled to gravity in a spatially at and spherically symmetric, isotropic and homogeneous space-time, with a variable timescale that avoids the final singularity. The equation of state that describes the collapse is $\omega =1$. We calculate the back-reaction of the space-time during the collapse and the energy density fluctuations related to this back-reaction has a spectral index $n_s=0$, favouring short-wavelengths modes to be detected. The interesting is that the amplitude of these fluctuations increase with time when the collapse is sufficiently strong.

11 pages, no figures

References in corpus (3)

• Scalar field collapse in a conformally flat spacetime
• Pre-inflation: origin of the Universe from a topological phase transition
• Scalar Field Collapse with an exponential potential

Cited by in corpus (2)

• Gravitational Collapse without Singularity Formation in Brans-Dicke Theory
• Gravitational collapse of a spherical scalar field