تقرير
On the energy of homogeneous cosmologies
| العنوان: | On the energy of homogeneous cosmologies |
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| المؤلفون: | Nester, James M., So, Lau Loi, Vargas, T. |
| المصدر: | Phys.Rev.D78:044035,2008 |
| سنة النشر: | 2008 |
| المجموعة: | Astrophysics General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | Astrophysics, General Relativity and Quantum Cosmology |
| الوصف: | 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. Comment: 11 pages, reformated with minor changes |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevD.78.044035 |
| URL الوصول: | http://arxiv.org/abs/0803.0181 |
| رقم الأكسشن: | edsarx.0803.0181 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevD.78.044035 |
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