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The Magnetic Part of the Weyl Tensor, and the Expansion of Discrete Universes | | Timothy Clifton
; Daniele Gregoris
; Kjell Rosquist
; | | Date: |
4 Jul 2016 | | Abstract: | We examine the effect that the magnetic part of the Weyl tensor has on the
large-scale expansion of space. This is done within the context of a class of
cosmological models that contain regularly arranged discrete masses, rather
than a continuous perfect fluid. The magnetic part of the Weyl tensor is
included in these models by performing a Taylor series expansion about a
hypersurface where it initially vanishes. At the same cosmological time,
measured as a fraction of the age of the universe, we find that the influence
of the magnetic part of the Weyl tensor increases as the number of masses in
the universe is increased. We also find that the influence of the magnetic part
of the Weyl tensor increases with time, relative to the leading-order electric
part, so that its contribution to the scale of the universe can reach values of
~1%, before the Taylor series approximation starts to break down. | | Source: | arXiv, 1607.0775 | | Services: | Forum | Review | PDF | Favorites | |
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