On Chirality of the Vorticity of the Universe

Palle, Davor (2012) On Chirality of the Vorticity of the Universe. Entropy, 14 (5). pp. 958-965. ISSN 1099-4300

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Abstract

The presence of dark energy in the Universe challenges the Einstein's theory of gravity at cosmic scales. It motivates the inclusion of rotational degrees of freedom in the Einstein-Cartan gravity, representing the minimal and the most natural extension of the General Relativity. One can, consequently, expect the violation of the cosmic isotropy by the rotating Universe. We study chirality of the vorticity of the Universe within the Einstein-Cartan cosmology. The role of the spin of fermion species during the evolution of the Universe is studied by averaged spin densities and Einstein-Cartan equations. It is shown that spin density of the light Majorana neutrinos acts as a seed for vorticity at early stages of the evolution of the Universe. Its chirality can be evaluated in the vicinity of the spacelike infinity. It turns out that vorticity of the Universe has right-handed chirality.

Item Type:	Article
Uncontrolled Keywords:	chirality; vorticity
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Projects:	Project title Project leader Project code Project type Kvantna teorija polja, nekomutativni prostori i simetrije- Stjepan Meljanac 098-0000000-2865 MZOS
Depositing User:	Davor Palle
Date Deposited:	24 Feb 2020 15:54
URI:	http://fulir.irb.hr/id/eprint/5312
DOI:	10.3390/e14050958

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