Energy conditions of nonsingular black hole spacetimes in conformal gravity
Abstract
Conformal gravity can elegantly solve the problem of spacetime singularities present in Einstein's gravity. For every physical spacetime, there is an infinite family of conformally equivalent singularityfree metrics. In the unbroken phase, every nonsingular metric is equivalent and can be used to infer the physical properties of the spacetime. In the broken phase, a Higgslike mechanism should select a certain vacuum, which thus becomes the physical one. However, in the absence of the complete theoretical framework we do not know how to select the right vacuum. In this paper, we study the energy conditions of nonsingular black hole spacetimes obtained in conformal gravity assuming they are solutions of Einstein's gravity with an effective energymomentum tensor. We check whether such conditions can be helpful to select the vacuum of the broken phase.
 Publication:

European Physical Journal C
 Pub Date:
 August 2017
 DOI:
 10.1140/epjc/s1005201751122
 arXiv:
 arXiv:1702.06855
 Bibcode:
 2017EPJC...77..542T
 Keywords:

 General Relativity and Quantum Cosmology
 EPrint:
 10 pages, 9 figures