Dynamical Chern-Simons modified gravity and Friedmann-Robertson-Walker metric

Details Dynamical Chern-Simons modified gravity and Friedmann-Robertson-Walker metric Dynamical Chern-Simons modified gravity and Friedmann-Robertson-Walker metric

2010-05-11

arxiv.org/abs/1005.1911v3

Physics

High Energy Physics

High Energy Physics - Theory

11 pages, revised version, new material added

Scientific paper

We study the conditions for the consistency of the Friedmann-Robertson-Walker (FRW) metric with the dynamical Chern-Simons modified gravity. It turns out to be that in this situation the accelerated expansion of the Universe takes place, with the time dependence of the scale factor turns out to be similar to the case of presence of the Chaplygin gas. Also we found that this modification changes the total density of the Universe and therefore gives a nontrivial impact to a cosmological scenario.

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