COT1 - Dark Energy and Universe Acceleration |
Speaker_ |
Füzfa, André |
Co-autors |
J.-M. Alimi |
Talk _ |
Dark Energy as a Born-Infeld Gauge Interaction Violating the Equivalence Principle |
Abstract _ |
We investigate the possibility that dark energy does not couple to gravitation in the same way than ordinary matter, yielding a violation of the weak and strong equivalence principles on cosmological scales. We build a transient mechanism in which gravitation is pushed away from general relativity by a Born-Infeld gauge interaction acting as an "Abnormally Weighting" (dark) Energy. This mechanism accounts for the Hubble diagram of far-away supernovae by cosmic acceleration and time variation of the gravitational constant while accounting naturally for the present tests on general relativity. This talk is based on the following results A.Füzfa, J.-M. Alimi, Phys.Rev. D73 (2006) 023520 (gr-qc/0511090) and A.Füzfa, J.-M. Alimi, astro-ph/0604517, submitted to Physical Review. |