Wormholes and black universes without phantom fields in Einstein-Cartan theory

被引:72
|
作者
Bronnikov, K. A. [1 ,2 ,3 ]
Galiakhmetov, A. M. [4 ]
机构
[1] VNIIMS, Ozyornaya Ul 46, Moscow 119361, Russia
[2] Peoples Friendship Univ Russia, Ul Miklukho Maklaya 6, Moscow 117198, Russia
[3] Natl Res Nucl Univ, MEPhI Moscow Engn Phys Inst, Moscow 115409, Russia
[4] Donetsk Natl Tech Univ, Ul Kirova 51, UA-84646 Gorlovka, Ukraine
关键词
COSMOLOGICAL MODELS; GENERAL-RELATIVITY; GRAVITY; TORSION;
D O I
10.1103/PhysRevD.94.124006
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
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页数:9
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