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• W2057233712 abstract "We show that simple scalar field models can give rise to curvature singularities in the effective Friedmann dynamics of loop quantum cosmology (LQC). We find singular solutions for spatially flat Friedmann-Robertson-Walker cosmologies with a canonical scalar field and a negative exponential potential, or with a phantom scalar field and a positive potential. While LQC avoids big bang or big rip type singularities, we find sudden singularities where the Hubble rate is bounded, but the Ricci curvature scalar diverges. We conclude that the effective equations of LQC are not in themselves sufficient to avoid the occurrence of curvature singularities." @default.
• W2057233712 created "2016-06-24" @default.
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• W2057233712 date "2008-12-17" @default.
• W2057233712 modified "2023-09-23" @default.
• W2057233712 title "Singularities in Loop Quantum Cosmology" @default.
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• W2057233712 doi "https://doi.org/10.1103/physrevlett.101.251302" @default.
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