Quintessence with quadratic coupling to dark matter

Details Quintessence with quadratic coupling to dark matter Quintessence with quadratic coupling to dark matter

2009-11-16

arxiv.org/abs/0911.3089v1

Phys.Rev.D81:083003,2010

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

11 pages, 8 figures, revtex

Scientific paper

10.1103/PhysRevD.81.083003

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 in the form of exponential quintessence. The three types of quadratic coupling all admit late-time accelerating critical points, but these are not scaling solutions. We also show that two types of coupling allow for a suitable matter era at early times and acceleration at late times, while the third type of coupling does not admit a suitable matter era.

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