Regular Article - Theoretical Physics
Hořava–Lifshitz dark energy
Department of Physics, University of Athens, 15771, Athens, Greece
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Revised: 17 February 2010
Published online: 31 March 2010
We formulate Hořava–Lifshitz cosmology with an additional scalar field that leads to an effective dark energy sector. We find that, due to the inherited features from the gravitational background, Hořava–Lifshitz dark energy naturally presents very interesting behaviors, possessing a varying equation-of-state parameter, exhibiting phantom behavior and allowing for a realization of the phantom divide crossing. In addition, Hořava–Lifshitz dark energy guarantees for a bounce at small scale factors and it may trigger the turnaround at large scale factors, leading naturally to cyclic cosmology.
© Springer-Verlag / Società Italiana di Fisica, 2010