A Simple Model for Quintessential Inflation

Details A Simple Model for Quintessential Inflation A Simple Model for Quintessential Inflation

2005-04-07

arxiv.org/abs/astro-ph/0504191v2

JCAP 0509:003,2005

Astronomy and Astrophysics

Astrophysics

11 pages, no figures. New references and comments added. Version published in JCAP

Scientific paper

10.1088/1475-7516/2005/09/003

We describe a simple toy model for quintessential inflation where a complex scalar field described by a lagrangian with a Peccei-Quinn U(1) symmetry spontaneously broken at a high energy scale and explicitly broken by instanton effects at a much lower energy can account for both the early inflationary phase and the recent accelerated expansion of the Universe. The real part of the complex field plays the role of the inflaton whereas the imaginary part, the "axion", is the quintessence field.

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