Inflaton Fragmentation and Oscillon Formation in Three Dimensions
By M. Amin, R. Easther, H. Finkel. 2010
134 citations recorded by the source corpus.
Analytical arguments suggest that a large class of scalar field potentials permit the existence of oscillons -- pseudo-stable, non-topological solitons -- in three spatial dimensions. In this paper we numerically explore oscillon solutions in three dimensions. We confirm the existence of these field configurations as solutions to the Klein-Gorden equation in an expanding background, and verify the predictions of Amin and Shirokoff for the characteristics of individual oscillons for their model. Further, we demonstrate that significant numbers of oscillons can be generated via fragmentation of the inflaton condensate, consistent with the analysis of Amin. These emergent oscillons can easily dominate the post-inflationary universe. Finally, both analytic and numerical results suggest that oscillons are stable on timescales longer than the post-inflationary Hubble time. Consequently, the post-inflationary universe can contain an effective matter-dominated phase, during which it is dominated by localized concentrations of scalar field matter.
Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/52b020a45a83d4e8a155df68831b30a31739a043
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
- Marco Peloso
- Peter Adshead
- Daniel G. Figueroa
- Evangelos Sfakianakis
- John T. Giblin Jr.
- T. Scully
- V. Domcke
- G. White
In Nuclear and High Energy Physics
- Marco Peloso
- Peter Adshead
- F. Muia
- Daniel G. Figueroa
- V. Domcke
- Evangelos Sfakianakis
- John T. Giblin Jr.
- T. Scully
Citations in the corpus
- Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies (2020, background): “Oscillons are very long-lived: their lifetime is model-dependent but typically J104=m (Gleiser and Sicilia 2008; Amin and Shirokoff 2010; Amin et al. 2010, 2012; Salmi and Hindmarsh 2012; Saffin et al. 2014; Antusch et al. 2019; Gleiser and Krackow 2019; Zhang et al. 2020), where m is the mass of…”
- Gauge-preheating and the end of axion inflation (2015, background): “It is known that under certain conditions pseudo-stable inflaton lumps, or oscillons [81, 95–97], can form from the post-inflationary detritus.”
- Black hole formation from axion stars (2016, methodology): “Note that since we have dropped the gradient terms in this analysis — and hence consider only the long wavelength limit of the true solution, it would be treacherous to analyze this result further using a Floquet type stability analysis [61, 62].”