Is de Sitter space always excluded in semiclassical f(R) gravity?
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Cosmology and Astroparticle Physics"
DOI: 10.1088/1475-7516/2019/06/005
Abstract: It is shown that the recent corpuscular description of gravity generically excludes de Sitter spacetime in any semiclassical version of f(R) gravity. A phantom phenomenology of the cosmic dynamics is also naturally excluded. read more here.
Keywords: always excluded; space always; sitter space; semiclassical gravity ... See more keywords
Schwarzschild geometry counterpart in semiclassical gravity
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DOI: 10.1103/physrevd.101.064059
Abstract: We investigate the effects of vacuum polarization on vacuum static spherically symmetric spacetimes. We start from the Polyakov approximation to the renormalized stress-energy tensor (RSET) of a minimally coupled massless scalar field. This RSET is… read more here.
Keywords: geometry counterpart; counterpart semiclassical; schwarzschild geometry; geometry ... See more keywords
Einstein-Dirac system in semiclassical gravity
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DOI: 10.1103/physrevd.107.124001
Abstract: We study the Dirac equation minimally coupled to general relativity using quantum field theory and the semiclassical gravity approximation. Previous studies of the Einstein-Dirac system did not quantize the Dirac field and required multiple independent… read more here.
Keywords: system; field; semiclassical gravity; einstein dirac ... See more keywords