The method of generating functions in exact scalar field inflationary cosmology

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

Inflationary cosmology with scalar field and radiation

We present a simple, exact and self-consistent cosmology with a phenomenological model of quantum creation of radiation due to decay of the scalar field. The decay drives a nonisentropic inflationary epoch, which exits smoothly to the radiation era, without reheating. The initial vacuum for radiation is a regular Minkowski vacuum. The created radiation obeys standard thermodynamic laws, and the...

متن کامل

The Scalar-Tensor Inflationary Cosmology

In this paper the scalar-tensor theory of gravity is assumed to describe the evolution of the universe and the gravitational scalar φ is ascribed to play the role of inflaton. The theory is characterized by the specified coupling function ω(φ) and the cosmological function λ(φ). The function λ(φ) is nearly constant for 0 < φ < 0.1 and λ(1) = 0. The functions λ(φ) and ω(φ) provide a double-well ...

متن کامل

Inflationary scalar spectrum in loop quantum cosmology

In the context of loop quantum cosmology, we consider an inflationary era driven by a canonical scalar field and occurring in the semiclassical regime, where spacetime is a continuum but quantum gravitational effects are important. The spectral amplitude and index of scalar perturbations on an unperturbed de Sitter background are computed at lowest order in the slow-roll parameters. The scalar ...

متن کامل

Interactions in Scalar Field Cosmology

We investigate spatially flat isotropic cosmological models which contain a scalar field with an exponential potential and a perfect fluid with a linear equation of state. We include an interaction term, through which the energy of the scalar field is transferred to the matter fields, consistent with a term that arises from scalar–tensor theory under a conformal transformation and field redefin...

متن کامل

An Exact Scalar Field Inflationary Cosmological Model Which Solves Cosmological Constant Problem, Dark Matter Problem and Other Problems of Inflationary Cosmology

An exact scalar field cosmological model is constructed from the exact solution of the field equations. The solutions are exact and no approximation like slow roll is used. The model gives inflation, solves horizon and flatness problems. The model also gives a satisfactory estimate of present vacuum energy density as well as vacuum energy density at Planck epoch and solves cosmological constant...

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: The European Physical Journal C

سال: 2018

ISSN: 1434-6044,1434-6052

DOI: 10.1140/epjc/s10052-018-5795-z