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The large-scale structure of the universe from a modified Friedmann equation

The Niels Bohr Institute, Copenhagen University, Blegdamsvej 17, DK-2100 Copenhagen Ø, Denmark

Institute for Mathematics, Astrophysics and Particle Physics, Radbaud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands

E-mail Address: ambjorn@nbi.dk

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and

Y. Watabiki

Tokyo Institute of Technology, Department of Physics, High Energy Theory Group, 2-12-1 Oh-okayama, Meguro-ku, Tokyo 152-8551, Japan

E-mail Address: watabiki@th.phys.titech.ac.jp

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https://doi.org/10.1142/S0217732323500682Cited by:2 (Source: Crossref)

Abstract

In this paper, we have suggested that the late time expansion of the Universe is caused by the absorption of baby universes. This absorption leads to a modified Friedmann equation with one free parameter B replacing the cosmological constant. The late time cosmology is modified in such a way that one can obtain agreement with the measured values of the Hubble parameter H(z) for z between 0 and the value corresponding to the time of last scattering of CMB for a suitable choice of B. In this paper, we show that the modified Friedmann equation with this choice of B also describes well other aspects of the large-scale structure of the Universe.

Keywords:

PACS: 04.60.–m, 98.80.–k, 98.80.Qc, 98.80.Es

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