871 citations · 18.5k across the 224 of their papers we have counts for
49 papers · 1 filter
Quintessence with quadratic coupling to dark matter
Christian G. Boehmer, Gabriela Caldera-Cabral, Nyein Chan +2
We introduce a new form of coupling between dark energy and dark matter that is quadratic in their energy densities. Then we investigate the background dynamics when dark energy is…
Magnetic Bianchi I Universe in Loop Quantum Cosmology
Roy Maartens, Kevin Vandersloot
We examine the dynamical consequences of homogeneous cosmological magnetic fields in the framework of loop quantum cosmology. We show that a big-bounce occurs in a collapsing magne…
Dynamics of interacting dark energy
Gabriela Caldera-Cabral, Roy Maartens, L. Arturo Urena-Lopez
Dark energy and dark matter are only indirectly measured via their gravitational effects. It is possible that there is an exchange of energy within the dark sector, and this offers…
Dynamics of dark energy with a coupling to dark matter
Christian G. Boehmer, Gabriela Caldera-Cabral, Ruth Lazkoz +1
Dark energy and dark matter are the dominant sources in the evolution of the late universe. They are currently only indirectly detected via their gravitational effects, and there c…
The Einstein static universe in Loop Quantum Cosmology
Luca Parisi, Marco Bruni, Roy Maartens +1
Loop Quantum Cosmology strongly modifies the high-energy dynamics of Friedman-Robertson-Walker models and removes the big-bang singularity. We investigate how LQC corrections affec…
Causality and the speed of sound
George Ellis, Roy Maartens, Malcolm MacCallum
A usual causal requirement on a viable theory of matter is that the speed of sound be at most the speed of light. In view of various recent papers querying this limit, the question…