Inflation from a massive scalar field and scalar perturbations of the metric

Details Inflation from a massive scalar field and scalar perturbations of the metric Inflation from a massive scalar field and scalar perturbations of the metric

2001-03-13

arxiv.org/abs/gr-qc/0103045v2

Nuovo Cim.B116:845-852,2001

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

To appear in Il Nuovo Cimento B

Scientific paper

In the framework of chaotic inflation we study the case of a massive scalar field using a semiclassical approach. We derive the energy density fluctuations in the infrared sector generated by matter field and gauge-invariant metric fluctuations by means of a different method. We find that the super Hubble density fluctuations increase during inflation for a massive scalar field, in agreement with the result obtained in a previous work in which a power-law expanding universe was considered.

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