Genericness of Big Bounce in isotropic loop quantum cosmology

Details Genericness of Big Bounce in isotropic loop quantum cosmology Genericness of Big Bounce in isotropic loop quantum cosmology

2004-07-19

arxiv.org/abs/gr-qc/0407074v4

Phys.Rev.Lett. 94 (2005) 011302

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, revtex4, two figures. In version 2, only e-print archive numbers are corrected. In version 3 a Reference is added. Fi

Scientific paper

10.1103/PhysRevLett.94.011302

The absence of isotropic singularity in loop quantum cosmology can be understood in an effective classical description as the universe exhibiting a Big Bounce. We show that with scalar matter field, the big bounce is generic in the sense that it is independent of quantization ambiguities and details of scalar field dynamics. The volume of the universe at the bounce point is parametrized by a single parameter. It provides a minimum length scale which serves as a cut-off for computations of density perturbations thereby influencing their amplitudes.

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