Cosmological footprints of loop quantum gravity

Details Cosmological footprints of loop quantum gravity Cosmological footprints of loop quantum gravity

2009-02-02

arxiv.org/abs/0902.0145v2

Phys.Rev.Lett.102:081301,2009

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Accepted by Phys. Rev. Lett., 7 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.102.081301

The primordial spectrum of cosmological tensor perturbations is considered as a possible probe of quantum gravity effects. Together with string theory, loop quantum gravity is one of the most promising frameworks to study quantum effects in the early universe. We show that the associated holonomy correction should modify the potential seen by gravitational waves during the inflationary amplification. The resulting power spectrum should exhibit a characteristic tilt. This opens a new window for cosmological tests of quantum gravity.

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