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Showing 2015 · gr-qcShow all

8 papers · 2 filters

gr-qc2015★ 7 cited

Cosmological singularities and bounce in Cartan-Einstein theory

Stefano Lucat, Tomislav Prokopec

We consider a generalized Einstein-Cartan theory, in which we add the unique covariant dimension four operators to general relativity that couples fermionic spin current to the tor…

gr-qc2015★ 25 cited

Late-time quantum backreaction of a very light nonminimally coupled scalar

Dražen Glavan, Tomislav Prokopec, Tomo Takahashi

We investigate the backreaction of the quantum fluctuations of a very light () nonminimally coupled spectator scalar field on the expansion dynamic…

gr-qc2015★ 37 cited

Quantum Scalar Corrections to the Gravitational Potentials on de Sitter Background

Sohyun Park, Tomislav Prokopec, R. P. Woodard

We employ the graviton self-energy induced by a massless, minimally coupled (MMC) scalar on de Sitter background to compute the quantum corrections to the gravitational potentials…

gr-qc2015★ 13 cited

Late time solution for interacting scalar in accelerating spaces

Tomislav Prokopec

We consider stochastic inflation in an interacting scalar field in spatially homogeneous accelerating space-times with a constant principal slow roll parameter . We show that, i…

gr-qc2015★ 4 cited

Topological inflation with graceful exit

Anja Marunović, Tomislav Prokopec

We investigate a class of models of topological inflation in which a super-Hubble-sized global monopole seeds inflation. These models are attractive since inflation starts from rat…

gr-qc2015★ 10 cited

Inflation from cosmological constant and nonminimally coupled scalar

Dražen Glavan, Anja Marunović, Tomislav Prokopec

We consider inflation in a universe with a positive cosmological constant and a nonminimally coupled scalar field, in which the field couples both quadratically and quartically to…