Dark Energy coupling with electromagnetism as seen from future low-medium redshift probes

5th Young Researcher Meeting, Trieste 2014

Pandolfi, Stefania^1

Dark Cosmology Centre, Niels Bohr Institute, University of Copenhagen, Julianes Maries Vej, Copenhagen

2100, Denmark^1

关键词: Accelerated expansion of the universe;    Cosmological constants;    Cosmological modeling;    Dark energy;    Fine structure constants;    Fundamental constants;    Scalar fields;    Space time;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/566/1/012005/pdf
DOI  :  10.1088/1742-6596/566/1/012005

来源: IOP

【 摘 要 】

Beyond the standard cosmological model where the late-time accelerated expansion of the universe is driven by a cosmological constant, the observed expansion can be reproduced as well by the introduction of an additional dynamical scalar field. In this case, the field is expected to be naturally coupled to the rest of the theory's fields, unless a (still unknown) symmetry suppresses this coupling. Therefore, this would possibly lead to some observational consequences, such as space-time variations of nature's fundamental constants. In this paper we investigate the coupling between a dynamical Dark Energy model and the electromagnetic field, and the corresponding evolution of the fine structure constant (α) with respect to the standard local value α0.