The exact WKB for cosmological particle production
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Publication:2028294
DOI10.1007/JHEP03(2021)090zbMATH Open1461.85002arXiv2010.14835MaRDI QIDQ2028294
Author name not available (Why is that?)
Publication date: 31 May 2021
Published in: (Search for Journal in Brave)
Abstract: The Bogoliubov transformation in cosmological particle production can be explained by the Stokes phenomena of the corresponding ordinary differential equation. The calculation becomes very simple as far as the solution is described by a special function. Otherwise, the calculation requires more tactics, where the Exact WKB (EWKB) may be a powerful tool. Using the EWKB, we discuss cosmological particle production focusing on the effect of more general interaction and classical scattering. The classical scattering appears when the corresponding scattering problem of the Schr"odinger equation develops classical turning points on the trajectory. The higher process of fermionic preheating is also discussed using the Landau-Zener model.
Full work available at URL: https://arxiv.org/abs/2010.14835
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