Back to Search
Start Over
On the energy of homogeneous cosmologies
- Source :
- Phys.Rev.D78:044035,2008
- Publication Year :
- 2008
-
Abstract
- An energy for the homogeneous cosmological models is presented. More specifically, using an appropriate natural prescription, we find the energy within any region with any gravitational source for a large class of gravity theories--namely those with a tetrad description--for all 9 Bianchi types. Our energy is given by the value of the Hamiltonian with homogeneous boundary conditions; this value vanishes for all regions in all Bianchi class A models, and it does not vanish for any class B model. This is so not only for Einstein's general relativity but, moreover, for the whole 3-parameter class of tetrad-teleparallel theories. For the physically favored one parameter subclass, which includes the teleparallel equivalent of Einstein's theory as an important special case, the energy for all class B models is, contrary to expectation, negative.<br />Comment: 11 pages, reformated with minor changes
- Subjects :
- Astrophysics
General Relativity and Quantum Cosmology
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys.Rev.D78:044035,2008
- Publication Type :
- Report
- Accession number :
- edsarx.0803.0181
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevD.78.044035