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dc.contributor.author | Bronnikov K. | |
dc.contributor.author | Chervon S. | |
dc.contributor.author | Sushkov S. | |
dc.date.accessioned | 2018-09-18T20:07:04Z | |
dc.date.available | 2018-09-18T20:07:04Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0202-2893 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/136663 | |
dc.description.abstract | We consider static, spherically symmetric solutions of general relativity with a non-linear sigma model (NSM) as a source, i.e., a set of scalar fields Φ = (Φ 1,...,Φ n) (so-called chiral fields) parametrizing a target space with a metric h ab(Φ). For NSM with zero potential V (Φ), it is shown that the space-time geometry is the same as with a single scalar field but depends on h ab. If the matrix h ab is positive-definite, we obtain the Fisher metric, originally found for a canonical scalar field with positive kinetic energy; otherwise we obtain metrics corresponding to a phantom scalar field, including singular and nonsingular horizons (of infinite area) and wormholes. In particular, the Schwarzschild metric can correspond to a nontrivial chiral field configuration, which in this case has zero stress-energy. Some explicit examples of chiral field configurations are considered. Some qualitative properties of NSM configurations with nonzero potentials are pointed out. © Pleiades Publishing, Ltd., 2009. | |
dc.relation.ispartofseries | Gravitation and Cosmology | |
dc.title | Wormholes supported by chiral fields | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 3 | |
dc.relation.ispartofseries-volume | 15 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 241 | |
dc.source.id | SCOPUS02022893-2009-15-3-SID71449083347 |