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Prog. Theor. Phys. Vol. 70 No. 2 (1983) pp. 394-411

Gauge-Invariant Scalar Perturbations in the New Inflationary Universe

Misao Sasaki

Research Institute for Fundamental Physics, Kyoto University, Kyoto 606

(Received March 18, 1983)

Abstract:

The time evolution of scalar perturbations in the new inflationary universe is investigated by using an extended version of Bardeen's gauge-invariant formulation. We show that depending on the matter contents of the background space-time the existence of exponentially expanding state either gives rise to large amplitude density perturbations of results in the amplification of initially existing perturbations. Then, for the universe which was homogeneous enough at small scales, we discuss the possibility of generating density perturbations from fluctuations associated with the cosmological particle creation.

URL : http://ptp.ipap.jp/link?PTP/70/394/
DOI : 10.1143/PTP.70.394

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Citing Article(s) :

1. Progress of Theoretical Physics Vol. 72 No. 5 (1984) pp. 989-999 :

   Scalar Perturbations at the Reheating Phase in a New Inflationary Universe

   Mitsue Den and Kenji Tomita

2. Progress of Theoretical Physics Vol. 72 No. 6 (1984) pp. 1266-1269 :

   Questions about Gravitational Instability of Axion Density Fluctuations in an Axion Dominated Universe

   Misao Sasaki

3. Progress of Theoretical Physics Vol. 76 No. 5 (1986) pp. 1036-1046 :

   Large Scale Quantum Fluctuations in the Inflationary Universe

   Misao Sasaki

4. Progress of Theoretical Physics Supplement No.78 (1984) pp. 1-166 :

   Cosmological Perturbation Theory

   Hideo Kodama and Misao Sasaki

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