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- W4300512900 abstract "Recently the so-called mimetic gravity approach has been used to obtain corrections to Friedmann equation of General Relativity similar to the ones present in loop quantum cosmology. In this paper, we propose an alternative way to derive this modified Friedmann equation via the so-called non-polynomial gravity approach, which consists in adding geometric non-polynomial higher derivative terms to Hilbert-Einstein action, which are nonetheless polynomials and lead to second order differential equation in Friedmann-Lema^itre-Robertson-Walker spacetimes. Our explicit action turns out to be a realization of the Helling proposal of effective action with infinite number of terms. The model is investigated also in presence of non vanishing cosmological constant and a new exact bounce solution is found and studied." @default.
- W4300512900 created "2022-10-03" @default.
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- W4300512900 date "2017-08-29" @default.
- W4300512900 modified "2023-09-27" @default.
- W4300512900 title "A non-polynomial gravity formulation for Loop Quantum Cosmology bounce" @default.
- W4300512900 doi "https://doi.org/10.48550/arxiv.1708.08667" @default.
- W4300512900 hasPublicationYear "2017" @default.
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