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Consistent effective theory of long-wavelength cosmological perturbations

Carroll, Sean M. and Leichenauer, Stefan and Pollack, Jason (2014) Consistent effective theory of long-wavelength cosmological perturbations. Physical Review D, 90 (2). Art. No. 023518. ISSN 1550-7998.

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Effective field theory provides a perturbative framework to study the evolution of cosmological large-scale structure. We investigate the underpinnings of this approach, and suggest new ways to compute correlation functions of cosmological observables. We find that, in contrast with quantum field theory, the appropriate effective theory of classical cosmological perturbations involves interactions that are nonlocal in time. We describe an alternative to the usual approach of smoothing the perturbations, based on a path-integral formulation of the renormalization group equations. This technique allows for improved handling of short-distance modes that are perturbatively generated by long-distance interactions.

Item Type:Article
Related URLs:
URLURL TypeDescription DOIArticle
Carroll, Sean M.0000-0002-4226-5758
Pollack, Jason0000-0003-4754-4905
Additional Information:© 2014 American Physical Society. Received 7 November 2013; published 11 July 2014. We thank Clifford Cheung and Mark Wise for helpful conversations. This research is funded in part by DOE Grant No. DE-FG02-92ER40701 and by the Gordon and Betty Moore Foundation through Grant No. 776 to the Caltech Moore Center for Theoretical Cosmology and Physics. The work of S. L. is supported by a John A. McCone Postdoctoral Fellowship.
Group:Moore Center for Theoretical Cosmology and Physics
Funding AgencyGrant Number
Department of Energy (DOE)DE-FG02-92ER40701
Gordon and Betty Moore Foundation776
John A. McCone Postdoctoral FellowshipUNSPECIFIED
Issue or Number:2
Classification Code:PACS: 95.35.+d, 11.10.-z, 98.65.Dx, 98.80.-k
Record Number:CaltechAUTHORS:20141120-145800084
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52016
Deposited By: Tony Diaz
Deposited On:21 Nov 2014 21:45
Last Modified:03 Oct 2019 07:38

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