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- National Research Tomsk State UniversityRU13 papers
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- Institute of Space SciencesES4 papers
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- Leibniz University HannoverDE3 papers
- L. N. Gumilyov Eurasian National UniversityKZ3 papers
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- Consejo Superior de Investigaciones CientíficasES2 papers
49 papers
Fourth derivative gravity in the auxiliary fields representation and application to the black hole stability
Sebastiao Mauro, Roberto Balbinot, Alessandro Fabbri +1
We consider an auxiliary fields formulation for the general fourth-order gravity on an arbitrary curved background. The case of a Ricci-flat background is elaborated in full detail…
Effective potential energy for relativistic particles in the field of inclined rotating magnetized sphere
V. Epp, M. A. Masterova
The dynamics of a charged relativistic particle in electromagnetic field of a rotating magnetized celestial body with the magnetic axis inclined to the axis of rotation is studied.…
Gauss-Bonnet dark energy by Lagrange multipliers
Salvatore Capozziello, Andrey N. Makarenko, Sergei D. Odintsov
A string-inspired effective theory of gravity, containing Gauss-Bonnet invariant interacting with a scalar field, is considered in view of obtaining cosmological dark energy soluti…
Quasi-Rip universe induced by the fluid with inhomogeneous equation of state
I. Brevik, V. Obukhov, A. Timoshkin
We investigate a specific model for dark energy, which lead to the Quasi-Rip cosmology. In the Quasi-Rip model, the equation of the state parameter is less than -1 in the first…
Little Rip cosmological models with time-dependent equation of state
I. Brevik, V. V. Obukhov, K. E. Osetrin +1
Specific dark energy models, leading to the Little Rip (LR) cosmology in the far future, are investigated. Conditions for the occurrence of LR in terms of the parameters present in…
Particle number production and time variation with non-equilibrium quantum field theory
Ryuichi Hotta, Hiroyuki Takata, Takuya Morozumi
We study the particle number production and its time variation using non-equilibrium quantum field theory. We study the model proposed by Hotta et.al. \cite{Hotta:2012hi} for parti…