O ct 2 00 7 Regular accelerating Universe without dark energy
نویسنده
چکیده
Abstract. Homogeneous isotropic cosmological models with two torsion functions filled with scalar fields and usual gravitating matter are built and investigated in the framework of the Poincaré gauge theory of gravity. It is shown that by certain restrictions on indefinite parameters of gravitational Lagrangian the cosmological equations at asymptotics contain an effective cosmological constant that can explain observable acceleration of cosmological expansion. The behavior of inflationary cosmological solutions at extremely high energy densities is analyzed, regular bouncing solutions are obtained. The role of the space-time torsion provoking the acceleration of cosmological expansion is discussed.
منابع مشابه
ar X iv : 0 70 5 . 41 02 v 1 [ as tr o - ph ] 2 8 M ay 2 00 7 Resource Letter : Dark Energy and the Accelerating Universe
This Resource Letter provides a guide to the literature on dark energy and the accelerating universe. It is intended to be of use to researchers, teachers, and students at several levels. Journal articles, books, and websites are cited for the following topics: Einstein’s cosmological constant, quintessence or dynamical scalar fields, modified cosmic gravity, relations to high energy physics, c...
متن کاملun 2 00 7 Regular accelerating Universe without dark energy
Abstract. Homogeneous isotropic cosmological models with two torsion functions filled with scalar fields and usual gravitating matter are built and investigated in the framework of the Poincaré gauge theory of gravity. It is shown that by certain restrictions on indefinite parameters of gravitational Lagrangian the cosmological equations at asymptotics contain effective cosmological constant th...
متن کاملar X iv : a st ro - p h / 06 06 12 4 v 1 6 J un 2 00 6 Inhomogeneous Cosmology , Inflation and Late - Time Accelerating Universe
An inhomogeneous cosmology describing a spacetime without symmetry is shown to be able to inflate the early universe and explain the late-time acceleration of the universe without a cosmological constant and negative pressure dark energy and avoid the coincidence problem. e-mail: [email protected]
متن کاملar X iv : a st ro - p h / 01 10 21 1 v 1 9 O ct 2 00 1 Quintessence – the Dark Energy in the Universe ?
Quintessence – the energy density of a slowly evolving scalar field – may constitute a dynamical form of the homogeneous dark energy in the universe. We review the basic idea and indicate observational tests which may distinguish quintessence from a cosmological constant.
متن کاملar X iv : a st ro - p h / 05 10 20 7 v 1 7 O ct 2 00 5 Dark energy in hybrid inflation Jinn - Ouk
The situation that a scalar field provides the source of the accelerated expansion of the universe while rolling down its potential is common in both the simple models of the primordial inflation and the quintessence-based dark energy models. Motivated by this point, we address the possibility of causing the current acceleration via the primordial inflation using a simple model based on hybrid ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2008