Cosmology from quantum potential
Abstract
It was shown recently that replacing classical geodesics with quantal (Bohmian) trajectories gives rise to a quantum corrected Raychaudhuri equation (QRE). In this article we derive the second order Friedmann equations from the QRE, and show that this also contains a couple of quantum correction terms, the first of which can be interpreted as cosmological constant (and gives a correct estimate of its observed value), while the second as a radiation term in the early universe, which gets rid of the bigbang singularity and predicts an infinite age of our universe.
 Publication:

Physics Letters B
 Pub Date:
 February 2015
 DOI:
 10.1016/j.physletb.2014.12.057
 arXiv:
 arXiv:1404.3093
 Bibcode:
 2015PhLB..741..276F
 Keywords:

 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Nongalactic Astrophysics;
 High Energy Physics  Theory
 EPrint:
 4 pages, revtex4, 1 figure,references added, to appear in Phys. Lett. B