Cosmological singularities and 2-dimensional dilaton gravity
Sign Up to like & getrecommendations! Published in 2020 at "Journal of High Energy Physics"
DOI: 10.1007/jhep08(2020)062
Abstract: We study Big-Bang or -Crunch cosmological singularities in 2-dimensional dilaton-gravity-scalar theories, in general obtained by dimensional reduction of higher dimensional theories. The dilaton potential encodes information about the asymptotic data defining the theories, and encompasses… read more here.
Keywords: cosmological singularities; dilaton gravity; dilaton; singularities dimensional ... See more keywords
Quantum Transitions Through Cosmological Singularities
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2017/07/007
Abstract: In a quantum theory of cosmology spacetime behaves classically only in limited patches of the configuration space on which the wave function of the universe is defined. Quantum transitions can connect classical evolution in different… read more here.
Keywords: cosmological singularities; quantum transitions; cosmology; transitions cosmological ... See more keywords
Elimination of cosmological singularities in quantum cosmology by suitable operator orderings
Sign Up to like & getrecommendations! Published in 2019 at "Physical Review D"
DOI: 10.1103/physrevd.100.046008
Abstract: Canonical quantization of general relativity does not yield a unique quantum theory for gravity. This is in part due to operator ordering ambiguities. In this paper, we investigate the role of different operator orderings on… read more here.
Keywords: elimination cosmological; operator; singularities quantum; cosmological singularities ... See more keywords