This article is cited in 8 papers

Black holes and particles with zero or negative energy

A. A. Grib^ab, Yu. V. Pavlov<sup>cd

a</sup> Herzen State Pedagogical University of Russia, St. Petersburg, Russia
^b Friedmann Laboratory for Theoretical Physics, St. Petersburg, Russia
^c Institute of Problems of Mechanical Engineering RAS, St. Petersburg, Russia
^d Lobachevsky Institute of Mathematics and Mechanics, Kazan Federal University, Kazan, Russia

Abstract: 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 particle energy is uniquely determined by the angular velocity of its rotation in the ergosphere. We give a simple proof of the fact that extreme black holes cannot exist. We investigate the question of the possibility of an unlimited energy increase in the center-of-mass system of two colliding particles, one or both of which have negative or zero energy.

Keywords: black hole, Kerr metric, negative-energy particle, particle collision, geodesic.

Received: 15.12.2015

DOI: 10.4213/tmf9124

 English version: Theoretical and Mathematical Physics, 2017, 190:2, 268–278

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