Gravitational Radiation from Preheating with Many Fields
arXiv:1006.0935 · doi:10.1088/1475-7516/2010/08/012
Abstract
Parametric resonances provide a mechanism by which particles can be created just after inflation. Thus far, attention has focused on a single or many inflaton fields coupled to a single scalar field. However, generically we expect the inflaton to couple to many other relativistic degrees of freedom present in the early universe. Using simulations in an expanding Friedmann-Lemaître-Robertson-Walker spacetime, in this paper we show how preheating is affected by the addition of multiple fields coupled to the inflaton. We focus our attention on gravitational wave production--an important potential observational signature of the preheating stage. We find that preheating and its gravitational wave signature is robust to the coupling of the inflaton to more matter fields.
7 pages, 8 figures, v2 submission version, thank you for comments!
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Cited by in corpus (10)
- Nonperturbative Dynamics Of Reheating After Inflation: A Review
- Inflaton Fragmentation and Oscillon Formation in Three Dimensions
- Preheating with Non-Minimal Kinetic Terms
- Gravitational wave production from preheating with trilinear interactions
- Gravitational Waves from Preheating in M-flation
- "Stairway to Heaven" -- Spectroscopy of Particle Couplings with Gravitational Waves
- Characterizing the post-inflationary reheating history, Part II: Multiple interacting daughter fields
- Gravitational Wave Symphony from Oscillating Spectator Scalar Fields
- Enhanced Preheating after Multi-Field Inflation: On the Importance of being Special
- Potential Surge Preheating: enhanced resonance from potential features