skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Breaking of spatial diffeomorphism invariance, inflation and the spectrum of cosmological perturbations

Abstract

Standard inflationary models yield a characteristic signature of a primordial power spectrum with a red tensor and scalar tilt. Nevertheless, Cannone et al. [1] recently suggested that, by breaking the assumption of spatial diffeomorphism invariance in the context of the effective field theory of inflation, a blue tensor spectrum can be achieved without violating the Null Energy Condition. In this context, we explore in which cases the inflationary model of [2] can yield a blue tilt of the tensor modes along with a red tilt in the scalar spectrum. Ultimately, we analyze under which conditions the model of [3] can reproduce the specific consistency relation of String Gas Cosmology.

Authors:
Publication Date:
OSTI Identifier:
22525293
Resource Type:
Journal Article
Journal Name:
Journal of Cosmology and Astroparticle Physics
Additional Journal Information:
Journal Volume: 2015; Journal Issue: 10; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1475-7516
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL INFLATION; COSMOLOGY; DISTURBANCES; ENERGY SPECTRA; FIELD THEORIES; INFLATIONARY UNIVERSE; SCALARS; TENSORS

Citation Formats

Graef, L. L., and Brandenberger, R., E-mail: leilagraef@usp.br, E-mail: rhb@physics.mcgill.ca. Breaking of spatial diffeomorphism invariance, inflation and the spectrum of cosmological perturbations. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/10/009.
Graef, L. L., & Brandenberger, R., E-mail: leilagraef@usp.br, E-mail: rhb@physics.mcgill.ca. Breaking of spatial diffeomorphism invariance, inflation and the spectrum of cosmological perturbations. United States. https://doi.org/10.1088/1475-7516/2015/10/009
Graef, L. L., and Brandenberger, R., E-mail: leilagraef@usp.br, E-mail: rhb@physics.mcgill.ca. 2015. "Breaking of spatial diffeomorphism invariance, inflation and the spectrum of cosmological perturbations". United States. https://doi.org/10.1088/1475-7516/2015/10/009.
@article{osti_22525293,
title = {Breaking of spatial diffeomorphism invariance, inflation and the spectrum of cosmological perturbations},
author = {Graef, L. L. and Brandenberger, R., E-mail: leilagraef@usp.br, E-mail: rhb@physics.mcgill.ca},
abstractNote = {Standard inflationary models yield a characteristic signature of a primordial power spectrum with a red tensor and scalar tilt. Nevertheless, Cannone et al. [1] recently suggested that, by breaking the assumption of spatial diffeomorphism invariance in the context of the effective field theory of inflation, a blue tensor spectrum can be achieved without violating the Null Energy Condition. In this context, we explore in which cases the inflationary model of [2] can yield a blue tilt of the tensor modes along with a red tilt in the scalar spectrum. Ultimately, we analyze under which conditions the model of [3] can reproduce the specific consistency relation of String Gas Cosmology.},
doi = {10.1088/1475-7516/2015/10/009},
url = {https://www.osti.gov/biblio/22525293}, journal = {Journal of Cosmology and Astroparticle Physics},
issn = {1475-7516},
number = 10,
volume = 2015,
place = {United States},
year = {Thu Oct 01 00:00:00 EDT 2015},
month = {Thu Oct 01 00:00:00 EDT 2015}
}