Wormholes and black universes without phantom fields in Einstein-Cartan theory
Jul 26, 2016
9 pages
Published in:
- Phys.Rev.D 94 (2016) 12, 124006
- Published: Dec 2, 2016
e-Print:
- 1607.07791 [gr-qc]
View in:
Citations per year
Abstract: (APS)
We obtain a family of regular static, spherically symmetric solutions in Einstein-Cartan theory with an electromagnetic field and a nonminimally coupled scalar field with the correct sign of kinetic energy density. At different values of its parameters, the solution, being asymptotically flat at large values of the radial coordinate, describes (i) twice asymptotically flat symmetric wormholes, (ii) asymmetric wormholes with an AdS asymptotic at the “far end,” (iii) regular black holes with an extremal horizon or two simple horizons, and (iv) black universes with a de Sitter asymptotic at the far end. As in other black universe models, it is a black hole as seen by a distant observer, but beyond its horizon there is a nonsingular expanding universe. In all these cases, both the metric and the torsion are regular in the whole space.Note:
- 10 pages, 6 figures
- 04.20.-q
- 04.20.Jb
- 04.40.-b
- 98.80.Jk
- Einstein–Cartan theory
- scalar field
- nonminimal coupling
- wormholes
- regular black holes
- black universes
References(59)
Figures(12)
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