Irreversible processes in inflationary cosmological models

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Irreversible Processes in Inflationary Cosmological Models

By using the thermodynamic theory of irreversible processes and Einstein general relativity, a cosmological model is proposed where the early universe is considered as a mixture of a scalar field with a matter field. The scalar field refers to the inflaton while the matter field to the classical particles. The irreversibility is related to a particle production process at the expense of the gra...

متن کامل

Loop Corrections to Cosmological Perturbations in Multi-field Inflationary Models

We investigate one-loop quantum corrections to the power spectrum of adiabatic perturbation from entropy modes/adiabatic mode cross-interactions in multiple DBI inflationary models. We find that due to the non-canonical kinetic term in DBI models, the loop corrections are enhanced by slow-varying parameter ǫ and small sound speed cs. Thus, in general the loop-corrections in multi-DBI models can...

متن کامل

Observational Tests of One-Bubble Open Inflationary Cosmological Models

Motivated by recent studies of the one-bubble inflationary scenario, simple open cold dark matter models are tested for consistency with cosmological observations. The initial perturbation spectrum is derived by solving for the evolution of fluctuations in an open inflationary stage. A likelihood analysis is performed for the Cosmic Microwave Background anisotropies using the two-year COBE DMR ...

متن کامل

New contribution to cosmological perturbations of some inflationary models.

We show that there are inflationary models for which perturbations in the energy momentum tensor, which are of second order in the scalar field, cannot be neglected. We first specify the conditions under which the usual first order perturbations are absent. We then analyze classically, the growth and decay of our new type of perturbations for one mode of fluctuations δφk in the scalar field. We...

متن کامل

Cosmological Perturbations in an Inflationary Universe

After introducing the perturbed metric tensor in a Friedmann-Robertson–Walker (FRW) background we review how the metric perturbations can be split into scalar, vector and tensor perturbations according to their transformation properties on spatial hypersurfaces and how these perturbations transform under small coordinate transformations. This allows us to introduce the notion of gauge-invariant...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical Review D

سال: 2002

ISSN: 0556-2821,1089-4918

DOI: 10.1103/physrevd.66.063503