Accelerating Universe with spacetime torsion but without dark matter and dark energy

Abstract

It is shown that cosmological equations for homogeneous isotropic models deduced in the framework of the Poincaré gauge theory of gravity by certain restrictions on indefinite parameters of gravitational Lagrangian take at asymptotics the same form as cosmological equations of general relativity theory for ΛCDM-model. Terms related to dark matter and dark energy in cosmological equations of standard theory for ΛCDM-model are connected in considered theory with the change of gravitational interaction provoked by spacetime torsion.

Cosmology in Poincaré gauge gravity with a pseudoscalar torsion

“…A famous example is the Poincaré gauge theory of Gravity [30][31][32][33][34][35][36][37]. Some works have been done to develop a model of geometric dark energy in the Poincaré gauge theory framework [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56]. In [38][39][40][41][42][43] the effect of torsion is to introduce an extra-term into matter density and pressure which gives rise to an accelerated behavior of the universe.…”

“…The torsion model in [44][45][46][47][48] contributes an oscillating aspect to the expansion rate of the universe and displays features similar to those of only the presently observed accelerating universe. In [49][50][51][52][53][54][55][56] the Lagrangian involves too many terms and indefinite parameters, which make the field equations complicated and difficult to solve and the role of each term obscure. In order to simplify the field equations, some restrictions on indefinite parameters have to be imposed.…”

A local description of dark energy in terms of classical two-component massive spin-one uncharged fields on spacetimes with torsionful affinities

“…with the involved ϑ-pieces thus occurring in the skew contributions that make up in each formalism a suitably chosen asymmetric spin a nity for ∇µ, in agreement with Equation (5). Hence, making use of the standard patterns [39] ϑ µA…”

“…Since the discovery of the cosmic dark energy [1,2], several attempts have been made [3][4][5][6][7][8][9] at accomplishing a macroscopic explanation of the presently observable acceleration of the universe [10,11], while circumventing the situations concerning some of the problems that arise in the context of the standard cosmology [4,12]. One of the most popular approaches that were designed in this connection describes dark energy in a geometrically torsionless fash-*Corresponding Author: Jorge G. Cardoso: Department of Mathematics, Centre for Technological Sciences-UDESC, Joinville 89219-710 SC, Brazil., E-mail: jorge.cardoso@udesc.br ion as a gravitationally repulsive cosmic background modelled either by a positive cosmological constant or by a scalar eld to which a physical meaning may possibly be ascribed.…”

Gauge approach and quantization methods in gravity theory

“…Yuri Obukhov was born in Berlin in 1956 (2002 and 2006) a visiting professor at the Institute for Theoretical Physics of the University of Sao Paulo (UNESP), and a research fellow at the Mathematics Department of the University College London (2009)(2010)(2011). Since 2013 he is a senior scientist at the Nuclear Safety Institute of the Russian Academy of Sciences.…”