Cosmology and Time
arXiv:1304.3823 · doi:10.1051/epjconf/20135802004
Abstract
Time has always played a crucial role in cosmology. I review some of the aspects of the present cosmological model which are more directly related to time, such as: the definition of a cosmic time; the existence of typical timescales and epochs in an expanding universe; the problem of the initial singularity and the origin of time; the cosmological arrow of time.
Invited talk given at the Time Machine Factory conference, October 14-19, 2012, Turin, Italy. To appear in the proceedings published by EPJ (2013)