Inflaton field fluctuations from gauge - invariant metric fluctuations during inflation
نویسندگان
چکیده
The evolution of the inflaton field fluctuations from gauge-invariant metric fluctuations is discussed. In particular, the case of a symmetric φ c-exponential potential is analyzed.
منابع مشابه
Scalar Metric fluctuations in Space Time Matter inflation
Using the Ponce de Leon background metric, which describes a 5D universe in an apparent vacuum: ¯ G AB = 0, we study the effective 4D evolution of both, the inflaton and gauge-invariant scalar metric fluctuations, in the recently introduced model of space time matter inflation.
متن کاملGauge invariant metric perturbations during reheating
The possible amplification of gauge invariant metric fluctuations in the infrared sector are very important during reheating stage of inflation. In this stage the inflaton field oscillates around the minimum of the scalar potential. The evolution for the super Hubble scales gauge invariant metric fluctuations can be studied by means of the Bardeen parameter. For a massive scalar field with pote...
متن کاملX iv : g r - qc / 0 60 50 90 v 1 1 5 M ay 2 00 6 Scalar Metric fluctuations in Space Time Matter inflation
Using the Ponce de Leon background metric, which describes a 5D universe in an apparent vacuum: ¯ G AB = 0, we study the effective 4D evolution of both, the inflaton and gauge-invariant scalar metric fluctuations, in the recently introduced model of space time matter inflation.
متن کاملComments on non-Gaussian density perturbations and the production of primordial black holes
We review the basic arguments for the likelihood of non-Gaussian density perturbations in inflation models with primordial black hole (PBH) production. We discuss our derived distributions of field fluctuations and their implications, specifically commenting on the finetuning problem. We also discuss how the derived distributions may be affected when linked to metric perturbations. While linkin...
متن کاملInflation from a massive scalar field and scalar perturbations of the metric
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 wi...
متن کامل