Two-scalar-field model for the interaction of dark energy and dark matter

• Type: Article in International Scientific Journal
• Date: 2012

Authors

bertolami, o (Author) FCUP; carrilho, p (Author) Other; Jorge Páramos (Author) FCUP

Journal

Title: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 86 No. 025008

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 31 Citations

Scopus - 30 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-002-3BS

DOI: 10.1103/PhysRevD.86.103522

Abstract (EN): In this paper, we study the effects of an interaction between dark matter and dark energy through a two-scalar-field model with a potential V(phi, chi) = e(-lambda phi) P(phi, chi), where P(phi, chi) is a polynomial. We show that the cosmic expansion dynamics of the Universe is reproduced for a large range of the bare mass of the dark matter field and that there exist solutions with transient accelerated expansion. A modification in the exponential behavior of the potential is studied, with important physical implications, including the possibility of more realistic transient acceleration solutions.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8