Solution to the cosmologicalconstant problem in a Regge quantum gravity model
Abstract
We show that it is possible to solve the cosmological constant (CC) problem in a discrete quantum gravity theory based on Regge calculus by using the effective action approach and a special pathintegral measure. The effective cosmological constant is given as a sum of 3 terms: the classical CC, the quantum gravity CC and the matter CC. Since the observations can only measure the sum of these 3 terms, we can choose the classical CC to be equal to the negative value of the matter CC. Hence the effective CC is given only by the quantum gravity CC, which is determined by the pathintegral measure. Since the pathintegral measure depends on a free parameter, this parameter can be chosen such that the effective CC gives the observed value.
 Publication:

EPL (Europhysics Letters)
 Pub Date:
 May 2015
 DOI:
 10.1209/02955075/110/40008
 arXiv:
 arXiv:1407.1394
 Bibcode:
 2015EL....11040008M
 Keywords:

 General Relativity and Quantum Cosmology;
 High Energy Physics  Phenomenology;
 High Energy Physics  Theory
 EPrint:
 v4: published version. arXiv admin note: substantial text overlap with arXiv:1407.1124