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

Title: Gravitational wave background from reheating after hybrid inflation

Abstract

The reheating of the Universe after hybrid inflation proceeds through the nucleation and subsequent collision of large concentrations of energy density in the form of bubblelike structures moving at relativistic speeds. This generates a significant fraction of energy in the form of a stochastic background of gravitational waves, whose time evolution is determined by the successive stages of reheating: First, tachyonic preheating makes the amplitude of gravity waves grow exponentially fast. Second, bubble collisions add a new burst of gravitational radiation. Third, turbulent motions finally sets the end of gravitational waves production. From then on, these waves propagate unimpeded to us. We find that the fraction of energy density today in these primordial gravitational waves could be significant for grand unified theory (GUT)-scale models of inflation, although well beyond the frequency range sensitivity of gravitational wave observatories like LIGO, LISA, or BBO. However, low-scale models could still produce a detectable signal at frequencies accessible to BBO or DECIGO. For comparison, we have also computed the analogous gravitational wave background from some chaotic inflation models and obtained results similar to those found by other groups. The discovery of such a background would open a new observational window into the very earlymore » universe, where the details of the process of reheating, i.e. the big bang, could be explored. Moreover, it could also serve in the future as a new experimental tool for testing the inflationary paradigm.« less

Authors:
; ;  [1]
  1. Departamento de Fisica Teorica, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid, Spain and Instituto de Fisica Teorica CSIC-UAM, Universidad Autonoma de Madrid, Cantoblanco, 28049 Madrid (Spain)
Publication Date:
OSTI Identifier:
21039105
Resource Type:
Journal Article
Journal Name:
Physical Review. D, Particles Fields
Additional Journal Information:
Journal Volume: 77; Journal Issue: 4; Other Information: DOI: 10.1103/PhysRevD.77.043517; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0556-2821
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AMPLITUDES; CHAOS THEORY; COMPARATIVE EVALUATIONS; COSMOLOGY; ENERGY DENSITY; GRAND UNIFIED THEORY; GRAVITATIONAL RADIATION; GRAVITATIONAL WAVES; GRAVITY WAVES; RELATIVISTIC RANGE; SCALE MODELS; SENSITIVITY; STOCHASTIC PROCESSES; TACHYONS; UNIVERSE

Citation Formats

Garcia-Bellido, Juan, Figueroa, Daniel G, and Sastre, Alfonso. Gravitational wave background from reheating after hybrid inflation. United States: N. p., 2008. Web. doi:10.1103/PHYSREVD.77.043517.
Garcia-Bellido, Juan, Figueroa, Daniel G, & Sastre, Alfonso. Gravitational wave background from reheating after hybrid inflation. United States. https://doi.org/10.1103/PHYSREVD.77.043517
Garcia-Bellido, Juan, Figueroa, Daniel G, and Sastre, Alfonso. Fri . "Gravitational wave background from reheating after hybrid inflation". United States. https://doi.org/10.1103/PHYSREVD.77.043517.
@article{osti_21039105,
title = {Gravitational wave background from reheating after hybrid inflation},
author = {Garcia-Bellido, Juan and Figueroa, Daniel G and Sastre, Alfonso},
abstractNote = {The reheating of the Universe after hybrid inflation proceeds through the nucleation and subsequent collision of large concentrations of energy density in the form of bubblelike structures moving at relativistic speeds. This generates a significant fraction of energy in the form of a stochastic background of gravitational waves, whose time evolution is determined by the successive stages of reheating: First, tachyonic preheating makes the amplitude of gravity waves grow exponentially fast. Second, bubble collisions add a new burst of gravitational radiation. Third, turbulent motions finally sets the end of gravitational waves production. From then on, these waves propagate unimpeded to us. We find that the fraction of energy density today in these primordial gravitational waves could be significant for grand unified theory (GUT)-scale models of inflation, although well beyond the frequency range sensitivity of gravitational wave observatories like LIGO, LISA, or BBO. However, low-scale models could still produce a detectable signal at frequencies accessible to BBO or DECIGO. For comparison, we have also computed the analogous gravitational wave background from some chaotic inflation models and obtained results similar to those found by other groups. The discovery of such a background would open a new observational window into the very early universe, where the details of the process of reheating, i.e. the big bang, could be explored. Moreover, it could also serve in the future as a new experimental tool for testing the inflationary paradigm.},
doi = {10.1103/PHYSREVD.77.043517},
url = {https://www.osti.gov/biblio/21039105}, journal = {Physical Review. D, Particles Fields},
issn = {0556-2821},
number = 4,
volume = 77,
place = {United States},
year = {2008},
month = {2}
}