Inflationary universe in loop quantum cosmology

Details Inflationary universe in loop quantum cosmology Inflationary universe in loop quantum cosmology

2007-05-18

arxiv.org/abs/0705.2656v2

JCAP0708:012,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

21 pages, 4 figures; accepted for publication in JCAP

Scientific paper

10.1088/1475-7516/2007/08/012

Loop quantum cosmology provides a nice solution of avoiding the big bang singularity through a big bounce mechanism in the high energy region. In loop quantum cosmology an inflationary universe is emergent after the big bounce, no matter what matter component is filled in the universe. A super-inflation phase without phantom matter will appear in a certain way in the initial stage after the bounce; then the universe will undergo a normal inflation stage. We discuss the condition of inflation in detail in this framework. Also, for slow-roll inflation, we expect the imprint from the effects of the loop quantum cosmology should be left in the primordial perturbation power spectrum. However, we show that this imprint is too weak to be observed.

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