The Exact WKB analysis for asymmetric scalar preheating
arXiv:2203.04497 · doi:10.1007/JHEP01(2023)088
Abstract
Using the exact WKB analysis of the higher-order differential equations, we analyze the asymmetry in dynamical particle production of a complex scalar field. The solution requires the Stokes phenomena of the fourth-order differential equation. We found that the interference of different types of the Stokes phenomena causes matter-antimatter asymmetry. We also showed a specific example where asymmetry is forbidden in the exact calculation, but a false asymmetry appears in the perturbative expansion.
38 pages, 7 fugures, style changed, refined arguments
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