5 papers
Generalized Lemaître time for rotating and charged black holes and its near-horizon properties
A. V. Toporensky, O. B. Zaslavskii
We consider the behavior of the analogue of the Lemaitre time when a particle approaches the horizon of a rotating black hole. For the Kerr metric, the aforementioned time coincide…
A note on splitting solutions in dimensional quadratic gravity
Daniel Müller, Alexey Toporensky
In the present paper we consider anisotropic cosmological vacuum solutions in (4+1) dimensional general quadratic gravity. In particular, we present a solution with 3 equal and 1 d…
Six-dimensional cosmological models with conformal extensions
Daniel Muller, Sergey G. Rubin, Ilya L. Shapiro +1
We consider the background cosmological solutions in the (six-dimensional) model with one time and five space coordinates. The theory of our interest has the action composed b…
Kinematic censorship and high energy particle collisions in the Schwarzschild background
A. V. Toporensky, O. B. Zaslavskii
We consider near-horizon collisions between two particles moving freely in the Schwarzschild metric in the region outside the horizon. One of them emerges from a white hole. We scr…
Initial conditions for Starobinsky inflation in general quadratic gravity
Daniel Muller, Alexey Toporensky
We consider initial conditions leading to Starobinsky inflation in the general quadratic gravity, where the action of the theory contains one more curvature square invariant in add…