Indications of causal set cosmology

Details Indications of causal set cosmology Indications of causal set cosmology

2000-03-10

arxiv.org/abs/gr-qc/0003043v3

Int.J.Theor.Phys.39:1731-1736,2000

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, plainTeX. Wording has been clarified further in places Text of a talk entitled ``Causal Sets and Stochastic Spacetime

Scientific paper

10.1023/A:1003629312096

Within the context of a recently proposed family of stochastic dynamical laws for causal sets, one can ask whether the universe might have emerged from the quantum-gravity era with a large enough size and with sufficient homogeneity to explain its present-day large-scale structure. In general, such a scenario would be expected to require the introduction of very large or very small fundamental parameters into the theory. However, there are indications that such ``fine tuning'' is not necessary, and a large homogeneous and isotropic cosmos can emerge naturally, thanks to the action of a kind of renormalization group associated with cosmic cycles of expansion and re-contraction.

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