Accelerated expansion from non-linear derivative interaction and Gauss-Bonnet invariant

Details Accelerated expansion from non-linear derivative interaction and Gauss-Bonnet invariant Accelerated expansion from non-linear derivative interaction and Gauss-Bonnet invariant

Apr 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ap%26ss.326..175e&link_type=abstract

Astrophysics and Space Science, Volume 326, Issue 2, pp.175-179

Astronomy and Astrophysics

Astrophysics

1

Non-Linear Derivative Interaction, Gauss–Bonnet Gravity, Dark Energy, Accelerated Expansion

Scientific paper

We discuss in this letter a new cosmological model including both a non-linear derivative interaction and a Gauss-Bonnet invariant. The first interaction term appears in the theory with the Galilean shift symmetry, whereas the second term is motivated from string theory and plays a crucial role in Chern-Simons gravitational theories as well as in the renormalization of quantum field theories in curved spacetime. It is shown that the presence of both the cubic interaction and the Gauss-Bonnet invariant term supply amazingly prosperous cosmological phenomenologies, which are explored in some detail.

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