dc.contributor.author |
Bambi, Cosimo
|
|
dc.contributor.author |
Malafarina, D.
|
|
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 |
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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 |