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- W3093334866 abstract "The presence of complex hierarchical gravitational structures is one of the main features of the observed universe. Here, structure formation is studied both for the standard ($mathrm{ensuremath{Lambda}}mathrm{CDM}$) cosmological model and for the Dirac-Milne universe, a matter-antimatter symmetric universe that was recently proposed as an alternative ``coasting'' cosmological scenario. One-dimensional numerical simulations reveal the analogies and differences between the two models. Although structure formation is faster in the Dirac-Milne universe, both models predict that it ends shortly before the present epoch, at cosmological redshift $zensuremath{approx}3$ for the Dirac-Milne cosmology, and at $zensuremath{approx}0.5$ for the $mathrm{ensuremath{Lambda}}mathrm{CDM}$ universe. The present results suggest that the matter power spectrum observed by the Sloan Digital Sky Survey might be entirely due to the nonlinear evolution of matter and antimatter domains of relatively small initial dimensions, of the order of a few tens of parsecs comoving at cosmological redshift $z=1080$." @default.
- W3093334866 created "2020-10-22" @default.
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- W3093334866 date "2020-11-13" @default.
- W3093334866 modified "2023-10-14" @default.
- W3093334866 title "Structure formation in a Dirac-Milne universe: Comparison with the standard cosmological model" @default.
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- W3093334866 doi "https://doi.org/10.1103/physrevd.102.103518" @default.
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