Published July 21, 2017
| Published
Journal Article
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Natural Covariant Planck Scale Cutoffs and the Cosmic Microwave Background Spectrum
Abstract
We calculate the impact of quantum gravity–motivated ultraviolet cutoffs on inflationary predictions for the cosmic microwave background spectrum. We model the ultraviolet cutoffs fully covariantly to avoid possible artifacts of covariance breaking. Imposing these covariant cutoffs results in the production of small, characteristically k-dependent oscillations in the spectrum. The size of the effect scales linearly with the ratio of the Planck to Hubble lengths during inflation. Consequently, the relative size of the effect could be as large as one part in 10^5; i.e., eventual observability may not be ruled out.
Additional Information
© 2017 American Physical Society. Received 18 January 2017; revised manuscript received 1 May 2017; published 18 July 2017. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of High Energy Physics, under Award No. DE-SC0011632, as well as by the Walter Burke Institute for Theoretical Physics at Caltech and the Gordon and Betty Moore Foundation through Grant No. 776 to the Caltech Moore Center for Theoretical Cosmology and Physics. A. K. and A. C.-D. acknowledge support from the Natural Sciences and Engineering Research Council of Canada (NSERC). R. T. W. M. acknowledges support by the National Research Foundation (NRF) of South Africa, CPRR Grant No. 90551.Attached Files
Published - PhysRevLett.119.031301.pdf
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PhysRevLett.119.031301.pdf
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Additional details
- Eprint ID
- 79159
- Resolver ID
- CaltechAUTHORS:20170718-133638130
- Department of Energy (DOE)
- DE-SC0011632
- Walter Burke Institute for Theoretical Physics, Caltech
- Gordon and Betty Moore Foundation
- 776
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- National Research Foundation of South Africa
- 90551
- Created
-
2017-07-18Created from EPrint's datestamp field
- Updated
-
2021-11-15Created from EPrint's last_modified field
- Caltech groups
- Walter Burke Institute for Theoretical Physics