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arXiv 1807.06385gr-qc
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用非线性电动力学将非线性引力映射到广义相对论

Mapping nonlinear gravity into General Relativity with nonlinear electrodynamics

Victor I. Afonso, Gonzalo J. Olmo, Emanuele Orazi, Diego Rubiera-Garcia

摘要:

我们表明,家庭的非线性引力理论制定的度量仿射方法和耦合到非线性电动力学理论可以映射到广义相对论(GR)耦合到另一个非线性电动力学理论。这允许使用纯代数变换从后者的解生成前者的解。这种对应关系是明确说明与爱丁顿启发的波恩-因菲尔德引力理论,我们认为一个家庭的非线性电动力学,并显示,在地图上,保持其代数结构。对于麦克斯韦电动力学耦合到玻恩-因菲尔德引力的特殊情况,我们发现,通过这种对应关系,玻恩-因菲尔德型非线性电动力学的GR侧。解决后者的球对称电真空的情况下,我们展示了如何直接提供正确的解决方案,为前者的地图。这一过程打开了一扇新的大门,探索天体物理和宇宙学的情况下,非线性引力理论,充分利用的分析和数值方法的框架内开发的GR。

英文摘要:

We show that families of nonlinear gravity theories formulated in a metric-affine approach and coupled to a nonlinear theory of electrodynamics can be mapped into General Relativity (GR) coupled to another nonlinear theory of electrodynamics. This allows to generate solutions of the former from those of the latter using purely algebraic transformations. This correspondence is explicitly illustrated with the Eddington-inspired Born-Infeld theory of gravity, for which we consider a family of nonlinear electrodynamics and show that, under the map, preserve their algebraic structure. For the particular case of Maxwell electrodynamics coupled to Born-Infeld gravity we find, via this correspondence, a Born-Infeld-type nonlinear electrodynamics on the GR side. Solving the spherically symmetric electrovacuum case for the latter, we show how the map provides directly the right solutions for the former. This procedure opens a new door to explore astrophysical and cosmological scenarios in nonlinear gravity theories by exploiting the full power of the analytical and numerical methods developed within the framework of GR.

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