Trapped ghosts: A new class of wormholes

We construct examples of static, spherically symmetric wormhole solutions in general relativity with a minimally coupled scalar field whose kinetic energy is negative in a restricted region of space near the throat (of arbitrary size) and positive far away from it. Thus in such configurations a 'ghost' is trapped in the strong-field region, which may in principle explain why no ghosts are observed under usual conditions. Some properties of general wormhole models with the field are revealed: it is shown that (i) trapped-ghost wormholes are only possible with nonzero potentials V(); (ii) in wormholes with two asymptotically flat regions, a nontrivial potential V() has an alternate sign and (iii) a wormhole with two asymptotically flat regions which is mirror symmetric with respect to its throat has necessarily a zero Schwarzschild mass at both asymptotics. © 2010 IOP Publishing Ltd.

Авторы
Bronnikov K.A. 1, 2 , Sushkov S.V.3, 4
Номер выпуска
9
Язык
Английский
Статус
Опубликовано
Номер
095022
Том
27
Год
2010
Организации
  • 1 Center of Gravitation and Fundamental Metrology, VNIIMS, Ozyornaya St. 46, Moscow 119361, Russian Federation
  • 2 Institute of Gravitation and Cosmology, PFUR, Miklukho-Maklaya St. 6, Moscow 117198, Russian Federation
  • 3 Department of General Relativity and Gravitation, Kazan State University, Kremlyovskaya St. 18, Kazan 420008, Russian Federation
  • 4 Department of Mathematics, Tatar State University of Humanities and Education, Tatarstan St. 2, Kazan 420021, Russian Federation
Дата создания
19.10.2018
Дата изменения
19.10.2018
Постоянная ссылка
https://repository.rudn.ru/ru/records/article/record/2788/