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- W2752390950 abstract "Recently the so-called mimetic gravity approach has been used to obtain corrections to the 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 of adding geometric non-polynomial higher derivative terms to Hilbert–Einstein action, which are nonetheless polynomials and lead to a second-order differential equation in Friedmann–Lemaître–Robertson–Walker space-times. Our explicit action turns out to be a realization of the Helling proposal of effective action with an infinite number of terms. The model is also investigated in the presence of a non-vanishing cosmological constant, and a new exact bounce solution is found and studied." @default.
- W2752390950 created "2017-09-15" @default.
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- W2752390950 date "2017-09-07" @default.
- W2752390950 modified "2023-09-25" @default.
- W2752390950 title "A Non-Polynomial Gravity Formulation for Loop Quantum Cosmology Bounce" @default.
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- W2752390950 doi "https://doi.org/10.3390/galaxies5030051" @default.
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