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Cosmological Footprints of Loop Quantum Gravity

TitreCosmological Footprints of Loop Quantum Gravity
Type de publicationJournal Article
Year of Publication2009
AuteursGrain, J, Barrau, A
JournalPhysical Review Letters
Date PublishedFeb
ISBN Number0031-9007
Numéro d'accèsWOS:000263816200009

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 corrections 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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