重构非局域宇宙学的畸变函数
Reconstructing the Distortion Function for Nonlocal Cosmology
摘要:
我们考虑宇宙学的修改后的重力模型,其中牛顿常数是扭曲的函数的逆达朗伯作用于Ricci标量。我们推导出一种技术,用于选择的失真函数,以适应任意的扩展历史。这种方法被应用于数值的情况下,LambdaCDM宇宙学,结果符合一个简单的双曲正切。
英文摘要:
We consider the cosmology of modified gravity models in which Newton's constant is distorted by a function of the inverse d'Alembertian acting on the Ricci scalar. We derive a technique for choosing the distortion function so as to fit an arbitrary expansion history. This technique is applied numerically to the case of LambdaCDM cosmology, and the result agrees well with a simple hyperbolic tangent.
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