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Dynamics of dark energy

- E. Copeland, M. Sami, S. Tsujikawa
- Physics
- 8 March 2006

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… Expand

Cosmic F- and D-strings

- E. Copeland, R. Myers, J. Polchinski
- Physics
- 5 December 2003

Macroscopic fundamental and Dirichlet strings have several potential instabilities: breakage, tachyon decays, and confinement by axion domain walls. We investigate the conditions under which… Expand

Exponential potentials and cosmological scaling solutions

- E. Copeland, A. Liddle, D. Wands
- Physics
- 21 November 1997

Scalar fields have come to play a central role in current models of the early universe. The self-interaction potential energy density of such a field is undiluted by the expansion of the universe and… Expand

Quintessence arising from exponential potentials

- T. Barreiro, E. Copeland, N. Nunes
- Mathematics
- 12 October 1999

We demonstrate how the properties of the attractor solutions of exponential potentials can lead to models of quintessence with the currently observationally favored equation of state. Moreover, we… Expand

Model independent approach to the dark energy equation of state

- Pier Stefano Corasaniti, E. Copeland
- Physics
- 31 May 2002

The consensus of opinion in cosmology is that the Universe is currently undergoing a period of accelerated expansion. With current and proposed high precision experiments it offers the hope of being… Expand

Reconstructing the inflaton potential—an overview

- J. Lidsey, A. Liddle, E. Kolb, E. Copeland, T. Barreiro, M. Abney
- Environmental Science
- 17 August 1995

The authors review the relation between the inflationary potential and the spectra of density waves (scalar perturbations) and gravitational waves (tensor perturbations) produced, with particular… Expand

Dynamical systems applied to cosmology: Dark energy and modified gravity

- S. Bahamonde, C. Boehmer, S. Carloni, E. Copeland, W. Fang, N. Tamanini
- PhysicsPhysics Reports
- 8 December 2017

Quintessence models in supergravity

- E. Copeland, N. Nunes, F. Rosati
- Physics
- 22 May 2000

Scalar field models of quintessence typically require that the expectation value of the field today be of the order of the Planck mass, if we want them to explain the observed acceleration of the… Expand

General second order scalar-tensor theory, self tuning, and the Fab Four

- C. Charmousis, E. Copeland, Antonio Padilla, P. Saffin
- Physics
- 10 June 2011

Starting from the most general scalar-tensor theory with second order field equations in four dimensions, we establish the unique action that will allow for the existence of a consistent selftuning… Expand

Self-tuning and the derivation of a class of scalar-tensor theories

- C. Charmousis, E. Copeland, Antonio Padilla, P. Saffin
- Mathematics
- 24 May 2012

We have recently proposed a special class of scalar tensor theories known as the Fab Four. These arose from attempts to analyse the cosmological constant problem within the context of Horndeski's… Expand

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