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dc.contributor.author | Bambi, Cosimo![]() |
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dc.contributor.author | Malafarina, D.![]() |
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dc.contributor.author | Marcian`o, Antonino![]() |
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dc.contributor.author | Modesto, Leonardo![]() |
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dc.date.accessioned | 2015-12-23T06:26:13Z | |
dc.date.available | 2015-12-23T06:26:13Z | |
dc.date.issued | 2014-05-26 | |
dc.identifier.citation | Bambi Cosimo, Malafarina D., Marcian`o Antonino, Modesto Leonardo; 2014; Singularity avoidance in classical gravity from four-fermion interaction; http://arxiv.org/find/all/1/all:+malafarina/0/1/0/all/0/1 | ru_RU |
dc.identifier.uri | http://nur.nu.edu.kz/handle/123456789/962 | |
dc.description.abstract | We derive the dynamics of the gravitational collapse of a homogeneous and spherically symmetric cloud in a classical set-up endowed with a topological sector of gravity and a non-minimal coupling to fermions. The effective theory consists of the Einstein-Hilbert action plus Dirac fermions inter-acting through a four-fermion vertex. At the classical level, we obtain the same picture that has been recently studied by some of us within a wide range of effective theories inspired by a super-renormalizable and asymptotically free theory of gravity. The classical singularity is replaced by a bounce, beyond which the cloud re-expands indefinitely. We thus show that, even at a classical level, if we allow for a non-minimal coupling of gravity to fermions, event horizons may never form for a suitable choice of some parameters of the theory. | ru_RU |
dc.language.iso | en | ru_RU |
dc.subject | Research Subject Categories::NATURAL SCIENCES::Physics | ru_RU |
dc.subject | gravitational collapse | ru_RU |
dc.title | Singularity avoidance in classical gravity from four-fermion interaction | ru_RU |
dc.type | Article | ru_RU |