关于非解析f(R)-理论的生存性
On the Viability of a Non-Analytical f(R)-Theory
摘要:
在本文中,我们展示了如何幂律修正爱因斯坦-希尔伯特作用量提供了一个可行的修改后的引力理论,通过太阳系测试,当指数是值2和3之间。然后,我们实现这个范例的宇宙学设置概述了如何正确再现宇宙热历史的主要阶段。结果,我们发现模型的特征长度尺度上有两个不同的约束,即,一个来自太阳系测试的下限和一个通过保证物质主导宇宙演化的上限。
英文摘要:
In this paper, we show how a power-law correction to the Einstein-Hilbert action provides a viable modified theory of gravity, passing the Solar-System tests, when the exponent is between the values 2 and 3. Then, we implement this paradigm on a cosmological setting outlining how the main phases of the Universe thermal history are properly reproduced. As a result, we find two distinct constraints on the characteristic length scale of the model, i.e., a lower bound from the Solar-System test and an upper one by guaranteeing the matter dominated Universe evolution.
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