Phys. Rev. Lett. 102, 081301 (2009) [4 pages]Cosmological Footprints of Loop Quantum GravityReceived 1 September 2008; published 26 February 2009 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.081301
DOI:
10.1103/PhysRevLett.102.081301
PACS:
04.60.Bc, 04.60.Pp, 98.80.Cq, 98.80.Qc
|
|
About | Terms and Conditions | Subscriptions | Search | Help
Use of the American Physical Society websites and journals implies that the user has read and agrees to our Terms and Conditions and any applicable Subscription Agreement. Physical Review®, Physical Review Letters®, Reviews of Modern Physics®, and Physical Review Special Topics® are trademarks of the American Physical Society.