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- W2015902092 abstract "We explore the possible cosmological consequences of a running Newton’s constant, G(⎕), as suggested by the non-trivial ultraviolet fixed point scenario for Einstein gravity with a cosmological constant term. Here, we examine what possible effects a scale-dependent coupling might have on large-scale cosmological density perturbations. Starting from a set of manifestly covariant effective field equations, we develop the linear theory of density perturbations for a non-relativistic perfect fluid. The result is a modified equation for the matter density contrast, which can be solved and thus provides an estimate for the corrections to the growth index parameter, ɤ." @default.
- W2015902092 created "2016-06-24" @default.
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- W2015902092 date "2014-06-11" @default.
- W2015902092 modified "2023-09-28" @default.
- W2015902092 title "Quantum Gravity and Cosmological Density Perturbations" @default.
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- W2015902092 doi "https://doi.org/10.3390/galaxies2020275" @default.
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