تقرير
On the energy of homogeneous cosmologies
العنوان: | On the energy of homogeneous cosmologies |
---|---|
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 |
---|