تقرير
New Cases of Universality Theorem for Gravitational Theories
| العنوان: | New Cases of Universality Theorem for Gravitational Theories |
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| المؤلفون: | Fatibene, L., Ferraris, M., Francaviglia, M. |
| المصدر: | Class.Quant.Grav.27:165021,2010 |
| سنة النشر: | 2010 |
| المجموعة: | General Relativity and Quantum Cosmology |
| مصطلحات موضوعية: | General Relativity and Quantum Cosmology |
| الوصف: | The "Universality Theorem" for gravity shows that f(R) theories (in their metric-affine formulation) in vacuum are dynamically equivalent to vacuum Einstein equations with suitable cosmological constants. This holds true for a generic (i.e. except sporadic degenerate cases) analytic function f(R) and standard gravity without cosmological constant is reproduced if f is the identity function (i.e. f(R)=R). The theorem is here extended introducing in dimension 4 a 1-parameter family of invariants R' inspired by the Barbero-Immirzi formulation of GR (which in the Euclidean sector includes also selfdual formulation). It will be proven that f(R') theories so defined are dynamically equivalent to the corresponding metric-affine f(R) theory. In particular for the function f(R)=R the standard equivalence between GR and Holst Lagrangian is obtained. Comment: 10 pages, few typos corrected |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1088/0264-9381/27/16/165021 |
| الوصول الحر: | http://arxiv.org/abs/1003.1617Test |
| رقم الانضمام: | edsarx.1003.1617 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1088/0264-9381/27/16/165021 |
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