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Cosmological footprints of loop quantum gravity

J. Grain 1 A. Barrau 2, 3
1 APC-Gravitation - APC - Gravitation
APC (UMR_7164) - AstroParticule et Cosmologie, AEI - Max-Planck-Institut für Gravitationsphysik ( Albert-Einstein-Institut )
Abstract : 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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http://hal.in2p3.fr/in2p3-00358636
Contributor : Emmanuelle Vernay <>
Submitted on : Wednesday, February 4, 2009 - 8:47:58 AM
Last modification on : Saturday, September 19, 2020 - 4:54:44 AM

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J. Grain, A. Barrau. Cosmological footprints of loop quantum gravity. Physical Review Letters, American Physical Society, 2009, 102, pp.081301. ⟨10.1103/PhysRevLett.102.081301⟩. ⟨in2p3-00358636⟩

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