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The gravitational wave background from super-inflation in Loop Quantum Cosmology
E. J. Copeland, D. J. Mulryne, N. J. Nunes +1
We investigate the behaviour of tensor fluctuations in Loop Quantum Cosmology, focusing on a class of scaling solutions which admit a near scale-invariant scalar field power spectr…
Generalised cosmological scaling solutions
Edmund J. Copeland, Seung-Joo Lee, James E. Lidsey +1
Motivated by the recent interest in cosmologies arising from energy density modifications to the Friedmann equation, we analyse the scaling behaviour for a broad class of these cos…
The foundations of observing dark energy dynamics with the Wilkinson Microwave Anisotropy Probe
P. S. Corasaniti, M. Kunz, D. Parkinson +2
Detecting dark energy dynamics is the main quest of current dark energy research. Addressing the issue demands a fully consistent analysis of CMB, large scale structure and SN-Ia d…
Dark Energy in Chains
David Parkinson, Bruce A. Bassett, Edmund J. Copeland +2
Dark energy affects the CMB through its perturbations and affects both CMB and Sn-Ia through its background evolution. Using recent CMB and Sn-Ia data sets, together with the most…
Cosmological evolution of general scalar fields in a brane-world cosmology
Shuntaro Mizuno, Seung-Joo Lee, Edmund J. Copeland
We study the cosmology of a general scalar field and barotropic fluid during the early stage of a brane-world where the Friedmann constraint is dominated by the square of the energ…
Inflationary potentials yielding constant scalar perturbation spectral indices
Alberto Vallinotto, Edmund J. Copeland, Edward W. Kolb +2
We explore the types of slow-roll inflationary potentials that result in scalar perturbations with a constant spectral index, i.e., perturbations that may be described by a single…