Classicalization of Quantum Fluctuation in Inflationary Universe

Details Classicalization of Quantum Fluctuation in Inflationary Universe Classicalization of Quantum Fluctuation in Inflationary Universe

1997-01-20

arxiv.org/abs/gr-qc/9701043v1

Prog.Theor.Phys. 98 (1997) 1063-1080

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

24 pages, Latex, 2 Postscript figures

Scientific paper

10.1143/PTP.98.1063

We discuss the classicalization of a quantum state induced by an environment in the inflationary stage of the universe. The classicalization is necessary for the homogeneous ground sate to become classical non-homogeneous one accompanied with the statistical fluctuation, which is a plausible candidate for the seeds of structure formation. Using simple models, we show that i) the two classicalization criteria, the classical correlation and quantum decoherence, are simultaneously satisfied by the environment and that ii) the power spectrum of the resultant statistical fluctuation depends upon the detail of the classicalization process. Especially, the result ii) means that, taking account of the classicalization process, the inflationary scenario does not necessarily predict the unique spectrum which is usually believed.

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