Completing a previous analysis started in Giambò et al (2015 Class. Quantum Grav. 32 035009), we study flat Friedmann-Lemaître-Robertson-Walker models with a perfect fluid matter source and a scalar field nonminimally coupled to matter, self-interacting with a potential that may attain negative values. We prove that the evolution generically forces the Hubble function to diverge to in a finite time, except in case the potential exhibits a flat plateau at infinity (tending to zero from below); in that case we find conditions which may give rise to ever expanding or recollapsing cosmologies.

Negative potentials and collapsing universes II

GIAMBO', Roberto;
2015-01-01

Abstract

Completing a previous analysis started in Giambò et al (2015 Class. Quantum Grav. 32 035009), we study flat Friedmann-Lemaître-Robertson-Walker models with a perfect fluid matter source and a scalar field nonminimally coupled to matter, self-interacting with a potential that may attain negative values. We prove that the evolution generically forces the Hubble function to diverge to in a finite time, except in case the potential exhibits a flat plateau at infinity (tending to zero from below); in that case we find conditions which may give rise to ever expanding or recollapsing cosmologies.
2015
262
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11581/387170
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