Genericness of a Big Bounce in Isotropic Loop Quantum Cosmology
Ghanashyam DateThe Institute of Mathematical Sciences, CIT Campus, Chennai-600 113, IndiaGolam Mortuza HossainThe Institute of Mathematical Sciences, CIT Campus, Chennai-600 113, India
2005en
ABI
Abstract
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 a scalar matter field, the big bounce is generic in the sense that it is independent of quantization ambiguities and the 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 cutoff for computations of density perturbations thereby influencing their amplitudes.
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