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- W1760254898 abstract "In this paper, we explore an idea of having Newton's constant change its value depending on the curvature scale involved. Such modification leads to a particular scalar-tensor gravity theory, with the Lagrangian derived from renormalization group (RG) flow arguments. Several of the well-known f(R) modified gravity models have remarkably simple description in terms of the infrared renormalization group, but not the designer types in general. We find that de Sitter-like accelerated expansion can be generated even in the absence of cosmological constant term, entirely due to running of the Newton's constant. In hopes of tackling the problem of cosmological constant's smallness, we explore the flows which are capable of generating exponential hierarchy between infrared and ultraviolet scales, and investigate cosmological evolution in the models thus derived." @default.
- W1760254898 created "2016-06-24" @default.
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- W1760254898 date "2011-01-26" @default.
- W1760254898 modified "2023-10-16" @default.
- W1760254898 title "Small Cosmological Constant from Running Gravitational Coupling" @default.
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- W1760254898 doi "https://doi.org/10.48550/arxiv.1101.4995" @default.
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