Quantum radiation of oscillons
By M. Hertzberg. 2010
134 citations recorded by the source corpus.
Many classical scalar field theories possess remarkable solutions: coherently oscillating, localized clumps, known as oscillons. In many cases, the decay rate of classical small amplitude oscillons is known to be exponentially suppressed and so they are extremely long lived. In this work we compute the decay rate of quantized oscillons. We find it to be a power law in the amplitude and couplings of the theory. Therefore, the quantum decay rate is very different to the classical decay rate and is often dominant. We show that essentially all oscillons eventually decay by producing outgoing radiation. In single field theories the outgoing radiation has typically linear growth, while if the oscillon is coupled to other bosons the outgoing radiation can have exponential growth. The latter is a form of parametric resonance: explosive energy transfer from a localized clump into daughter fields. This may lead to interesting phenomenology in the early universe. Our results are obtained from a perturbative analysis, a nonperturbative Floquet analysis, and numerics.
Subfields: Astronomy and Astrophysics, Atomic and Molecular Physics, and Optics, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/0458bd71fc637e0fa93e104bf28d89a066061dda
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Citations in the corpus
- Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies (2020, background): “Oscillons eventually decay through classical [167] or quantum radiation [168].”
- Black hole formation from axion stars (2016, background): “For a generic axion star, k ω where ω is the characteristic frequency of the axion, and hence we also neglect this term at low orders [59, 60].”