Reconstructing the dark energy equation of state with varying couplings

P. P. Avelino, C. J.A.P. Martins, N. J. Nunes, K. A. Olive

Research output: Contribution to journalArticlepeer-review

59 Scopus citations

Abstract

We revisit the idea of using varying couplings to probe the nature of dark energy, in particular, by reconstructing its equation of state. We show that for the class of models studied this method can be far superior to the standard methods (using type Ia supernovae or weak lensing). We also show that the simultaneous use of measurements of the fine-structure constant α and the electron-to-proton mass ratio μ allows a direct probe of grand unification scenarios. We present forecasts for the sensitivity of this method, both for the near future and for the next generation of spectrographs-for the latter we focus on the planned CODEX instrument for ESO's Extremely Large Telescope (formerly known as OWL). A high-accuracy reconstruction of the equation of state may be possible all the way up to redshift z∼4.

Original languageEnglish (US)
Article number083508
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume74
Issue number8
DOIs
StatePublished - 2006

Fingerprint Dive into the research topics of 'Reconstructing the dark energy equation of state with varying couplings'. Together they form a unique fingerprint.

Cite this