On Chirality of the Vorticity of the Universe
نویسنده
چکیده
The presence of dark energy in the Universe challenges the Einstein’s theory 1 of gravity at cosmic scales. It motivates the inclusion of rotational degrees of freedom in 2 the Einstein-Cartan gravity, representing the minimal and the most natural extension of the 3 General Relativity. One can, consequently, expect the violation of the cosmic isotropy by 4 the rotating Universe. We study chirality of the vorticity of the Universe within the Einstein5 Cartan cosmology. The role of the spin of fermion species during the evolution of the Uni6 verse is studied by averaged spin densities and Einstein-Cartan equations. It is shown that 7 spin density of the light Majorana neutrinos acts as a seed for vorticity at early stages of 8 the evolution of the Universe. Its chirality can be evaluated in the vicinity of the spacelike 9 infinity. It turns out that vorticity of the Universe has right-handed chirality. 10
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ورودعنوان ژورنال:
- Entropy
دوره 14 شماره
صفحات -
تاریخ انتشار 2012