Non-perturbative Corrections to Particle Production from Coherent Oscillation
| العنوان: | Non-perturbative Corrections to Particle Production from Coherent Oscillation |
|---|---|
| المؤلفون: | Takehiko Asaka, Hiroaki Nagao |
| سنة النشر: | 2010 |
| مصطلحات موضوعية: | Physics, Coupling constant, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Physics and Astronomy (miscellaneous), Field (physics), Oscillation, FOS: Physical sciences, General Relativity and Quantum Cosmology (gr-qc), General Relativity and Quantum Cosmology, High Energy Physics - Phenomenology, Amplitude, Distribution function, High Energy Physics - Phenomenology (hep-ph), Quantum electrodynamics, Particle, Parametric oscillator, Scaling, Astrophysics - Cosmology and Nongalactic Astrophysics |
| الوصف: | We investigate particle production from coherent oscillation by using the method based on the Bogolyubov transformation. Especially, we study the case when the amplitude of the oscillation and also the coupling constants with the oscillating field are small in order to avoid the non-perturbative corrections from the broad parametric resonance. We derive the expressions for the distribution functions and the number densities of produced particles at the leading order of coupling constant. It is, however, found that these results fail to describe the exact particle production eventually due to the non-perturbative effects even if the coupling constants are small. We then introduce a simple method to handle with such corrections, i.e., the time averaging method. It is shown that this method successfully provides the evolution of the occupation numbers of the growing mode. Further, we point out that the approximate results by this method satisfy the exact scaling properties coming from the periodicity of the coherent oscillation. 24 pages, 8 figures |
| اللغة: | English |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c87bd692984e7d33a7cb7ebb9831aa5b http://arxiv.org/abs/1004.2125 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....c87bd692984e7d33a7cb7ebb9831aa5b |
| قاعدة البيانات: | OpenAIRE |
| الوصف غير متاح. |