Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Zlosnik, T. G"'
Autor:
Zlosnik, T. G., Westman, H. F.
Publikováno v:
Class.Quantum.Grav. 34 (2017) 245001
We investigate whether a spontaneously-broken gauge theory of the group $SU(2,2)$ may be a genuine competitor to General Relativity. The basic ingredients of the theory are an $SU(2,2)$ gauge field $A_{\mu}$ and a Higgs field $W$ in the adjoint repre
Externí odkaz:
http://arxiv.org/abs/1601.00567
Autor:
Westman, H. F., Zlosnik, T. G.
A distance can be measured by monitoring how much a wheel has rotated when rolled without slipping. This simple idea underlies the mathematics of Cartan geometry. The Cartan-geometric description of gravity consists of a SO(1,4) gauge connection $A^{
Externí odkaz:
http://arxiv.org/abs/1411.1679
Publikováno v:
Phys. Rev. D 89, 063542 (2014)
We investigate the possibility for classical metric signature change in a straightforward generalization of the first order formulation of gravity, dubbed "Cartan gravity". The mathematical structure of this theory mimics the electroweak theory in th
Externí odkaz:
http://arxiv.org/abs/1311.4481
Autor:
Westman, H. F., Zlosnik, T. G.
It has been known for some time that General Relativity can be regarded as a Yang-Mills-type gauge theory in a symmetry broken phase. In this picture the gravity sector is described by an $SO(1,4)$ or $SO(2,3)$ gauge field $A^{a}_{\phantom{a}b\mu}$ a
Externí odkaz:
http://arxiv.org/abs/1302.1103
Publikováno v:
Phys. Rev. D 87, 063504, 2013
Using the chiral representation for spinors we present a particularly transparent way to generate the most general spinor dynamics in a theory where gravity is ruled by the Einstein-Cartan-Holst action. In such theories torsion need not vanish, but i
Externí odkaz:
http://arxiv.org/abs/1212.0585
Autor:
Westman, H. F., Zlosnik, T. G.
Gravity is commonly thought of as one of the four force fields in nature. However, in standard formulations its mathematical structure is rather different from the Yang-Mills fields of particle physics that govern the electromagnetic, weak, and stron
Externí odkaz:
http://arxiv.org/abs/1209.5358
Autor:
Westman, H. F., Zlosnik, T. G.
The primary aim of this paper is to provide a simple and concrete interpretation of Cartan geometry in terms of the mathematics of idealized waywisers. Waywisers, also called hodometers, are instruments traditionally used to measure distances. The ma
Externí odkaz:
http://arxiv.org/abs/1203.5709
Autor:
Westman, H. F., Zlosnik, T. G.
It is well-known that General Relativity with positive cosmological constant can be formulated as a gauge theory with a broken SO(1,4) symmetry. This symmetry is broken by the presence of an internal space-like vector $V^A$, $A=0,...,4$, with SO(1,3)
Externí odkaz:
http://arxiv.org/abs/1201.2725
Autor:
Zlosnik, T. G.
The theory of cosmological perturbations is extended to spacetimes displaying isotropic expansion but anisotropic curvature. The perturbed Einstein equation and Boltzmann equations for massless and massive particles are derived in a general gauge and
Externí odkaz:
http://arxiv.org/abs/1107.0389
Autor:
Skordis, C., Zlosnik, T. G.
Modified Newtonian Dynamics is an empirical modification to Poisson's equation which has had success in accounting for the `gravitational field' $\Phi$ in a variety of astrophysical systems. The field $\Phi$ may be interpreted in terms of the weak fi
Externí odkaz:
http://arxiv.org/abs/1101.6019