التفاصيل البيبلوغرافية
| العنوان: |
Cosmology from a gauge induced gravity. |
| المؤلفون: |
Falciano, F., Sadovski, G., Sobreiro, R., Tomaz, A. |
| المصدر: |
General Relativity & Gravitation; Sep2017, Vol. 49 Issue 9, p1-21, 21p |
| مصطلحات موضوعية: |
METAPHYSICAL cosmology, EMERGENT gravity, YANG-Mills theory, LORENTZ theory, SPACETIME |
| مستخلص: |
The main goal of the present work is to analyze the cosmological scenario of the induced gravity theory developed in previous works. Such a theory consists on a Yang-Mills theory in a four-dimensional Euclidian spacetime with $${ SO}(m,n)$$ such that $$m+n=5$$ and $$m\in \{0,1,2\}$$ as its gauge group. This theory undergoes a dynamical gauge symmetry breaking via an Inönü-Wigner contraction in its infrared sector. As a consequence, the $${ SO}(m,n)$$ algebra is deformed into a Lorentz algebra with the emergency of the local Lorentz symmetries and the gauge fields being identified with a vierbein and a spin connection. As a result, gravity is described as an effective Einstein-Cartan-like theory with ultraviolet correction terms and a propagating torsion field. We show that the cosmological model associated with this effective theory has three different regimes. In particular, the high curvature regime presents a de Sitter phase which tends towards a $$\Lambda $$ CDM model. We argue that $${ SO}(m,n)$$ induced gravities are promising effective theories to describe the early phase of the universe. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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