Stochastic Gravitational Waves from Post-inflationary Structure Formation
arXiv:2212.00425 · doi:10.1103/PhysRevD.107.043503
Abstract
Following inflation, the Universe may pass through an early matter-dominated phase supported by the oscillating inflaton condensate. Initially small fluctuations in the condensate grow gravitationally on subhorizon scales and can collapse to form nonlinear ``inflaton halos''. Their formation and subsequent tidal interactions will source gravitational waves, resulting in a stochastic background in the present Universe. We extend N-body simulations that model the growth and interaction of collapsed structures to compute the resulting gravitational wave emission. The spectrum of this radiation is well-matched by semi-analytical estimates based on the collapse of inflaton halos and their tidal evolution. We use this semi-analytic formalism to infer the spectrum for scenarios where the early matter-dominated phase gives way to a thermalized universe at temperatures as low as and we discuss the possible experimental opportunities created by this signal in inflationary models in which thermalization takes place long after inflation has completed.
arXiv comment9 pages, 4 figures. Published version, Editors' suggestion
References in corpus (47)
- Advanced Virgo: a 2nd generation interferometric gravitational wave detector
- Advanced LIGO
- Planck 2018 results. X. Constraints on inflation
- Towards the Theory of Reheating After Inflation
- Cold and Fuzzy Dark Matter
- Universe Reheating after Inflation
- Cosmological Backgrounds of Gravitational Waves
- Gravitational Radiation from First-Order Phase Transitions
- A more accurate analytic calculation of the spectrum of cosmological perturbations produced during inflation
- KAGRA: 2.5 Generation Interferometric Gravitational Wave Detector
- What is the lowest possible reheating temperature?
- The International Pulsar Timing Array: First Data Release
- Gravitational Waves from Phase Transitions at the Electroweak Scale and Beyond
- Cosmological Constraints on Late-time Entropy Production
- Relic gravitational waves produced after preheating
- Theory and Numerics of Gravitational Waves from Preheating after Inflation
- Oscillons: Resonant Configurations During Bubble Collapse
- Bounds on very low reheating scenarios after Planck
- A Gravitational Wave Background from Reheating after Hybrid Inflation
- Oscillons After Inflation
- Nyx: A Massively Parallel AMR Code for Computational Cosmology
- Pseudo-Stable Bubbles
- Ultra-high precision cosmology from gravitational waves
- Gravitational Wave Production At The End Of Inflation
- A stochastic background of gravitational waves from hybrid preheating
- Stochastic Gravitational Wave Production After Inflation
- Self-resonance after inflation: oscillons, transients and radiation domination
- The Equation of State and Duration to Radiation Domination After Inflation
- Gravitational waves from an early matter era
- Primordial black holes from the preheating instability
- Gravity Waves from Tachyonic Preheating after Hybrid Inflation
- Inflaton Fragmentation and Oscillon Formation in Three Dimensions
- Gravitational Waves from Oscillon Preheating
- GUT-Scale Primordial Black Holes: Consequences and Constraints
- Gravitational waves from oscillons after inflation
- Collapse of Small-Scale Density Perturbations during Preheating in Single Field Inflation
- Measuring the spectrum of primordial gravitational waves with CMB, PTA and Laser Interferometers
- AxioNyx: Simulating Mixed Fuzzy and Cold Dark Matter
- Gravitational wave production from preheating: parameter dependence
- Gravitational Waves From the End of Inflation: Computational Strategies
- Delayed Reheating and the Breakdown of Coherent Oscillations
- Generation of gravitational waves during early structure formation between cosmic inflation and reheating
- Lighting the Dark: The Evolution of the Post-Inflationary Universe
- Gravitational Collapse in the Post-Inflationary Universe
- Formation of inflaton halos after inflation
- Inflaton Clusters and Inflaton Stars
- A new mechanism for primordial black hole formation during reheating
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- Post-inflationary structure formation boosted by parametric self-resonance
- Clustering and Runaway Merging in a Primordial Black Hole Dominated Universe