Magnetic wormholes and black universes with invisible ghosts

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.) The existence of such objects requires invoking scalars with negative kinetic energy (“phantoms, ” or “ghosts”), which are not observed under usual physical conditions. To account for that, the so-called “trapped ghosts” were previously introduced, i.e., scalars whose kinetic energy is only negative in a restricted strong-field region of space-time and positive outside it. This approach leads to certain problems, including instability (as is illustrated here by derivation of an effective potential for spherical pertubations of such systems). In this paper, we use for model construction what we call “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. © 2015, Pleiades Publishing, Ltd.

Авторы
Bronnikov K.A. 1, 2, 3 , Korolyov P.A.2
Номер выпуска
2
Язык
Английский
Страницы
157-165
Статус
Опубликовано
Том
21
Год
2015
Организации
  • 1 Center of Gravitation and Fundamental Metrology, VNIIMS, ul. Ozernaya 46, Moscow, 119361, Russian Federation
  • 2 Institute of Gravitation and Cosmology, PFUR, ul. Miklukho-Maklaya 6, Moscow, 117198, Russian Federation
  • 3 National Research Nuclear University “MEPhI” (Moscow Engineering Physics Institute), Moscow, Russian Federation
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/4577/