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- W3146739572 abstract "The early Cosmology driven by a single scalar field, both massless and massive, in the context of Eddington-inspired Born-Infeld gravity, is explored. We show the existence of nonsingular solutions of bouncing and loitering type (depending on the sign of the gravitational theory's parameter) replacing the Big Bang singularity, and discuss their properties. In addition, in the massive case we find some new features of the cosmological evolution depending on the value of the mass parameter, including asymmetries in the expansion/contraction phases, or a continuous transition between a contracting phase to an expanding one via an intermediate loitering phase. We also provide a combined analysis of cosmic chronometers, standard candles, BAO, and CMB data to constrain the model, finding that for roughly $vert epsilon vert lesssim 10^{-4}$ the model is compatible with the latest observations while successfully removing the Big Bang singularity." @default.
- W3146739572 created "2021-04-13" @default.
- W3146739572 creator A5047009759 @default.
- W3146739572 creator A5048391593 @default.
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- W3146739572 date "2021-03-29" @default.
- W3146739572 modified "2023-10-01" @default.
- W3146739572 title "Singularity-free and cosmologically viable Born-Infeld gravity with scalar matter." @default.
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