Dynamics of dark energy

Copeland, Edmund J. ; Sami, M. ; Tsujikawa, Shinji (2006) Dynamics of dark energy International Journal of Modern Physics D, 15 (11). pp. 1753-1935. ISSN 0218-2718

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Official URL: http://www.worldscinet.com/ijmpd/15/1511/S02182718...

Related URL: http://dx.doi.org/10.1142/S021827180600942X

Abstract

We review in detail a number of approaches that have been adopted to try and explain the remarkable observation of our accelerating universe. In particular we discuss the arguments for and recent progress made towards understanding the nature of dark energy. We review the observational evidence for the current accelerated expansion of the universe and present a number of dark energy models in addition to the conventional cosmological constant, paying particular attention to scalar field models such as quintessence, K-essence, tachyon, phantom and dilatonic models. The importance of cosmological scaling solutions is emphasized when studying the dynamical system of scalar fields including coupled dark energy. We study the evolution of cosmological perturbations allowing us to confront them with the observation of the Cosmic Microwave Background and Large Scale Structure and demonstrate how it is possible in principle to reconstruct the equation of state of dark energy by also using Supernovae Ia observational data. We also discuss in detail the nature of tracking solutions in cosmology, particle physics and braneworld models of dark energy, the nature of possible future singularities, the effect of higher order curvature terms to avoid a Big Rip singularity, and approaches to modifying gravity which leads to a late-time accelerated expansion without recourse to a new form of dark energy.

Item Type:Article
Source:Copyright of this article belongs to World Scientific Publishing Company.
Keywords:Dark Energy; Cosmological Constant; Scalar Fields; Particle Physics; Modified Gravity
ID Code:70519
Deposited On:19 Nov 2011 11:30
Last Modified:19 Nov 2011 11:30

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