The Exact WKB analysis for asymmetric scalar preheating

[摘要] 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.

[发布日期] 2022-12-19

[关键词] Baryo-and Leptogenesis;Nonperturbative Effects;Non-Equilibrium Field Theory