Preheating with trilinear interactions: tachyonic resonance
By J. Dufaux, Gary N. Felder, Lev Kofman, Marco Peloso, Dmitry Podolsky. 2006
236 citations recorded by the source corpus.
We investigate the effects of bosonic trilinear interactions in preheating after chaotic inflation. A trilinear interaction term allows for the complete decay of the massive inflaton particles, which is necessary for the transition to radiation domination. We found that typically the trilinear term is subdominant during early stages of preheating, but it actually amplifies parametric resonance driven by the four-legs interaction. In cases where the trilinear term does dominate during preheating, the process occurs through periodic tachyonic amplifications with resonance effects, which is so effective that preheating completes within a few inflaton oscillations. We develop an analytic theory of this process, which we call tachyonic resonance. We also study numerically the influence of trilinear interactions on the dynamics after preheating. The trilinear term eventually comes to dominate after preheating, leading to faster rescattering and thermalization than could occur without it. Finally, we investigate the role of non-renormalizable interaction terms during preheating. We find that if they are present they generally dominate (while still in a controllable regime) in chaotic inflation models. Preheating due to these terms proceeds through a modified form of tachyonic resonance.
Subfields: Astronomy and Astrophysics, Instrumentation
View Paper: https://www.semanticscholar.org/paper/db0fc46cc578d27d47eeb0bea0a162cc4ed499fe
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In Astronomy and Astrophysics
- Robert Brandenberger
- Evangelos Sfakianakis
- Anupam Mazumdar
- T. Scully
- F. Cyr-Racine
- Y. Mambrini
- K. Olive
- Peter Adshead
In Instrumentation
Citations in the corpus
- Gauge-preheating and the end of axion inflation (2015, methodology): “Extending the (linear) analysis beyond the first axion oscillation is straightforward, and can be achieved by combining the procedure we describe here with the method of [75].”
- Magnetogenesis from axion inflation (2016, background): “In particular, at the middle to upper range of the couplings allowed by black hole abundance, a range where backreaction cannot be neglected and lattice simulations are essential, reheating is essentially instantaneous, proceeding via a phase of tachyonic resonance [62] and completing within a singl”
- Reheating in Inflationary Cosmology: Theory and Applications (2010, background): “[37] Dufaux J-F, Felder GN, Kofman L, Peloso M, Podolsky D, “Preheating with Trilinear Interactions: Tachyonic Resonance,” JCAP 0607, 006 (2006).”
- Inflaton oscillations and post-inflationary reheating (2020, background): “Similar limits for φ→ bb and φφ→ bb apply and can also be approximated from R > 1 (see, for instance, [91]).”