Backreaction in cosmic screening approach
Backreaction in cosmic screening approach
复制标题
宇宙筛选方法中的逆反应
DOI:
10.1016/j.physletb.2023.137797
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发表时间:
2023
影响因子:
4.4
通讯作者:
Zhuk, Alexander
中科院分区:
文献类型:
--
作者:
Eingorn, Maxim;O'Briant, Brianna;Diouf, Adjaratou;Zhuk, Alexander
We investigate the backreaction of nonlinear perturbations on the global evolution of the Universe within the cosmic screening approach. To this end, we have considered the second-order scalar perturbations. An analytical study of these perturbations followed by a numerical evaluation shows that, first, the corresponding average values have a negligible backreaction effect on the Friedmann equations and, second, the second-order correction to the gravitational potential is much less than the first-order quantity. Consequently, the expansion of perturbations into orders of smallness in the cosmic screening approach is correct.
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DOI:
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DOI:
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发表时间:
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