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204 papers · 1 filter
A way to constrain a graviton mass from astronomical observations
Alexander F. Zakharov, Predrag Jovanovic, Dusko Borka +1
Along with a whole range of alternative theories of gravity, variants of the massive theory of gravity, i.e. the theory of gravity, in which the graviton has mass, have been active…
Vacuum Polarization Effects During the Reheating Epoch
A. B. Arbuzov, A. A. Nikitenko
Quantum effects in the era of reheating of the universe after inflation are considered. A semiclassical approach to gravity theory is applied within Starobinsky's inflationary mode…
On energy-momentum tensor for gravitational waves in gravity
Petr V. Tretyakov, Alexander N. Petrov
The classical Isaacson's procedure for describing back-reaction of the averaged energy-momentum for high frequency gravitational waves is generalized to the gravity case. Fr…
The impact of the eccentricity on the collapse of an ellipsoid into a black hole
A. G. Nikiforov, A. N. Baushev, M. V. Barkov
We consider the gravitational collapse of a homogeneous pressureless ellipsoid. We have shown that the minimal size that the ellipsoid can reach during collapse depends on its…
Spontaneous symmetry breaking as a result of extra dimensions compactification
Dmitry Chirkov, Alex Giacomini, Alexey Toporensky +1
We consider dynamics of a scalar field in compactification scenario of Einstein-Gauss-Bonnet cosmology. It is shown that if the field is non-minimally coupled to curvature, its asy…
On Thermodynamic Stability of Black Holes. Part II: AdS Family of Solutions
V. Avramov, H. Dimov, M. Radomirov +2
This study is aimed at providing a thorough analysis of the classical thermodynamic stability of black holes within the Anti-de Sitter (AdS) family. We utilize the Nambu bracket fo…