期刊
MODERN PHYSICS LETTERS A
卷 38, 期 12-13, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217732323500682
关键词
Quantum gravity; cosmology; quantum cosmology; causal dynamical triangulations; accelearation of the universe
This paper suggests that the late time expansion of the Universe is caused by the absorption of baby universes, and describes the late time cosmology using a modified Friedmann equation. The modified equation can achieve agreement with the measured values of the Hubble parameter H(z) between 0 and the time corresponding to the last scattering of cosmic microwave background (CMB) for a suitable choice of parameter B. Additionally, this modified Friedmann equation also accurately describes other aspects of the large-scale structure of the Universe.
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.
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