Regular Article - Theoretical Physics
Dark energy from conformal symmetry breaking
Department of Physics, Azarbaijan Shahid Madani University, Tabriz, 53714-161, Iran
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Revised: 16 March 2013
Published online: 10 April 2013
The breakdown of conformal symmetry in a conformally invariant scalar-tensor gravitational model is revisited in the cosmological context. Although the old scenario of conformal symmetry breaking in cosmology containing a scalar field has already been used in many earlier works, it seems that no special attention has been paid for the investigation on the possible connection between the breakdown of conformal symmetry and the existence of dark energy. In this paper, it is shown that the old scenario of conformal symmetry breaking in cosmology, if properly interpreted, not only has a potential ability to describe the origin of dark energy as a symmetry breaking effect, but also may resolve the coincidence problem.
© Springer-Verlag Berlin Heidelberg and Società Italiana di Fisica, 2013