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4 papers · 2 filters
Comparison of particle properties in Kerr metric and in rotating coordinates
A. A. Grib, Yu. V. Pavlov
Properties of particles in Kerr metric are compared with properties of particles in rotating coordinates in Minkowski space-time. It is shown that particles with negative and zero…
Properties of particles in the ergosphere of black holes
A. A. Grib, Yu. V. Pavlov
A new feature of the rotating black holes is the existence in their ergosphere of trajectories of particles with negative and zero energies. Here we analyze general properties of s…
Particle creation in the early Universe: achievements and problems
A. A. Grib, Yu. V. Pavlov
Results on particle creation from vacuum by the gravitational field of the expanding Friedmann Universe are presented. Finite results for the density of particles and the energy de…
Black holes and particles with zero or negative energy
A. A. Grib, Yu. V. Pavlov
We study properties of particles with zero or negative energy and a nonzero orbital angular momentum in the ergosphere of a rotating black hole. We show that the sign of the partic…