Effective field theory and nonGaussianity from general inflationary states
 Nishant Agarwal,
 R. Holman,
 Andrew J. Tolley,
 Jennifer Lin
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We study the effects of nontrivial initial quantum states for inflationary fluctuations within the context of the effective field theory for inflation constructed by Cheung et al. which allows us to discriminate between different initial states in a modelindependent way. We develop a Green’s function/path integral based formulation that incorporates initial state effects and use it to address questions such as how statedependent is the consistency relation for the bispectrum, how many efolds beyond the minimum required to solve the cosmological fine tunings of the big bang are we allowed so that some information from the initial state survives until late times, among others. We find that the socalled consistency condition relating the local limit of the bispectrum and the slowroll parameter is a statedependent statement that can be avoided for physically consistent initial states either with or without initial nonGaussianities.
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 Title
 Effective field theory and nonGaussianity from general inflationary states
 Journal

Journal of High Energy Physics
2013:85
 Online Date
 May 2013
 DOI
 10.1007/JHEP05(2013)085
 Online ISSN
 10298479
 Publisher
 SpringerVerlag
 Additional Links
 Topics
 Keywords

 Spontaneous Symmetry Breaking
 Cosmology of Theories beyond the SM
 SpaceTime Symmetries
 Industry Sectors
 Authors

 Nishant Agarwal ^{(1)}
 R. Holman ^{(2)}
 Andrew J. Tolley ^{(3)}
 Jennifer Lin ^{(4)}
 Author Affiliations

 1. McWilliams Center for Cosmology, Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213, U.S.A.
 2. Department of Physics, Carnegie Mellon University, Pittsburgh, PA, 15213, U.S.A.
 3. Department of Physics, Case Western Reserve University, 10900 Euclid Ave, Cleveland, OH, 44106, U.S.A.
 4. EFI and Department of Physics, University of Chicago, 5640 S. Ellis Ave, Chicago, IL, 60637, U.S.A.