Visible, invisible and trapped ghosts as sources of wormholes and black universes

International Conference on Particle Physics and Astrophysics

Bolokhov, S.V.^1 ; Bronnikov, K.A.^1,2,3 ; Korolyov, P.A.^1 ; Skvortsova, M.V.^2

Institute of Gravitation and Cosmology, PFUR, 6 Miklukho-Maklaya st., Moscow

117198, Russia^1

VNIIMS, 46 Ozyornaya st, Moscow

119361, Russia^2

National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), Kashirskoe highway 31, Moscow

115409, Russia^3

关键词: Asymptotics;    Black holes;    General Relativity;    Physical conditions;    Scalar fields;    Strong field;    Symmetric solution;    Weak field region;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/675/1/012013/pdf
DOI  :  10.1088/1742-6596/675/1/012013

来源: IOP

【 摘 要 】

We construct explicit examples of globally regular static, spherically symmetric solutions in general relativity with scalar and electromagnetic fields, describing traversable wormholes with flat and AdS asymptotics and regular black holes, in particular, black universes. (A black universe is a regular black hole with an expanding, asymptotically isotropic space-time beyond the horizon.) Such objects exist in the presence of scalar fields with negative kinetic energy ("phantoms", or "ghosts"), which are not observed under usual physical conditions. To account for that, we consider what we call "trapped ghosts" (scalars whose kinetic energy is only negative in a strong-field region of space-time) and "invisible ghosts", i.e., phantom scalar fields sufficiently rapidly decaying in the weak-field region. The resulting configurations contain different numbers of Killing horizons, from zero to four.