Energy-momentum and angular momentum of isotropic homogeneous cosmological models in a gauge theory of gravity

1995 ◽  
Vol 34 (11) ◽  
pp. 2307-2319 ◽  
Author(s):  
Janusz Garecki
Keyword(s):  
Angular Momentum ◽  
Gauge Theory ◽  
Cosmological Models ◽  
Homogeneous Cosmological Models ◽  
Theory Of Gravity ◽  
Gauge Theory Of Gravity

scholarly journals ANALYSIS OF REGULAR INFLATIONARY COSMOLOGICAL MODELS WITH TWO TORSION FUNCTIONS IN POINCARÉ GAUGE THEORY OF GRAVITY

2010 ◽  
Vol 25 (10) ◽  
pp. 2005-2022 ◽  
Author(s):  
A. S. GARKUN ◽  
V. I. KUDIN ◽  
A. V. MINKEVICH
Keyword(s):  
Gauge Theory ◽  
Initial Conditions ◽  
Big Bang ◽  
Cosmological Models ◽  
Quadratic Potential ◽  
Cosmological Expansion ◽  
Cosmological Solutions ◽  
Physical Variables ◽  
Theory Of Gravity ◽  
Gauge Theory Of Gravity

Regular inflationary Big Bang scenario with accelerating stage of cosmological expansion at asymptotics proposed earlier in the framework of the Poincaré gauge theory of gravity is investigated. Analysis of regular inflationary cosmological models with two torsion functions filled with scalar field with quadratic potential and ultrarelativistic matter is carried out numerically. Properties of different stages of regular inflationary cosmological solutions are studied, restrictions on admissible values of parameters and initial conditions at a bounce are found. The structure of extremum surface in space of physical variables is investigated.

scholarly journals A CHERN–SIMONS E8 GAUGE THEORY OF GRAVITY IN D = 15, GRAND UNIFICATION AND GENERALIZED GRAVITY IN CLIFFORD SPACES

2007 ◽  
Vol 04 (08) ◽  
pp. 1239-1257 ◽  
Author(s):  
CARLOS CASTRO
Keyword(s):  
Gauge Theory ◽  
Grand Unification ◽  
De Sitter ◽  
Sitter Group ◽  
Yang Mills ◽  
Theory Of Gravity ◽  
M Theory ◽  
Chern Simons ◽  
Topological Part ◽  
Gauge Theory Of Gravity

A novel Chern–Simons E8 gauge theory of gravity in D = 15 based on an octicE8 invariant expression in D = 16 (recently constructed by Cederwall and Palmkvist) is developed. A grand unification model of gravity with the other forces is very plausible within the framework of a supersymmetric extension (to incorporate spacetime fermions) of this Chern–Simons E8 gauge theory. We review the construction showing why the ordinary 11D Chern–Simons gravity theory (based on the Anti de Sitter group) can be embedded into a Clifford-algebra valued gauge theory and that an E8 Yang–Mills field theory is a small sector of a Clifford (16) algebra gauge theory. An E8 gauge bundle formulation was instrumental in understanding the topological part of the 11-dim M-theory partition function. The nature of this 11-dim E8 gauge theory remains unknown. We hope that the Chern–Simons E8 gauge theory of gravity in D = 15 advanced in this work may shed some light into solving this problem after a dimensional reduction.

CAN TORSION BE TREATED AS JUST ANOTHER TENSOR FIELD?

2012 ◽  
Vol 07 ◽  
pp. 158-164 ◽  
Author(s):  
JAMES M. NESTER ◽  
CHIH-HUNG WANG
Keyword(s):  
Gauge Theory ◽  
Tensor Field ◽  
Affine Connection ◽  
Cartan Geometry ◽  
Civita Connection ◽  
Levi Civita Connection ◽  
Alternative Gravity Theories ◽  
Theory Of Gravity ◽  
Gauge Theory Of Gravity ◽  
Alternative Gravity

Many alternative gravity theories use an independent connection which leads to torsion in addition to curvature. Some have argued that there is no physical need to use such connections, that one can always use the Levi-Civita connection and just treat torsion as another tensor field. We explore this issue here in the context of the Poincaré Gauge theory of gravity, which is usually formulated in terms of an affine connection for a Riemann-Cartan geometry (torsion and curvature). We compare the equations obtained by taking as the independent dynamical variables: (i) the orthonormal coframe and the connection and (ii) the orthonormal coframe and the torsion (contortion), and we also consider the coupling to a source. From this analysis we conclude that, at least for this class of theories, torsion should not be considered as just another tensor field.

scholarly journals Maxwell-affine gauge theory of gravity

2015 ◽  
Vol 751 ◽  
pp. 131-134 ◽  
Author(s):  
O. Cebecioğlu ◽  
S. Kibaroğlu
Keyword(s):  
Gauge Theory ◽  
Theory Of Gravity ◽  
Gauge Theory Of Gravity

scholarly journals Generalized plane waves in Poincaré gauge theory of gravity

2017 ◽  
Vol 96 (6) ◽  
Author(s):  
Milutin Blagojević ◽  
Branislav Cvetković ◽  
Yuri N. Obukhov
Keyword(s):  
Gauge Theory ◽  
Plane Waves ◽  
Theory Of Gravity ◽  
Gauge Theory Of Gravity
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