Effective gravitational action for 2D massive fermions
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DOI: 10.1007/jhep11(2021)165
Abstract: Abstract We work out the effective gravitational action for 2D massive Euclidean fermions in a small mass expansion. Besides the leading Liouville action, the order m2 gravitational action contains a piece characteristic of the Mabuchi… read more here.
Keywords: action massive; action; gravitational action; massive fermions ... See more keywords
Inflation in an effective gravitational model and asymptotic safety
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DOI: 10.1103/physrevd.98.043505
Abstract: We consider an inflationary model motivated by quantum effects of gravitational and matter fields near the Planck scale. Our Lagrangian is a resummed version of the effective Lagrangian recently obtained by Demmel, Saueressig, and Zanusso… read more here.
Keywords: inflation effective; model asymptotic; gravitational model; effective gravitational ... See more keywords
Effective Gravitational “Constant” in Scalar-(Curvature)Tensor and Scalar-Torsion Gravities
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DOI: 10.3390/universe3020037
Abstract: In theories where a scalar field couples nonminimally to gravity, the effective gravitational “constant” becomes dependent on the value of the scalar field. This note first gives a brief review on how the cosmological evolution… read more here.
Keywords: tensor scalar; gravitational constant; tensor; effective gravitational ... See more keywords