Superadiabatic basis in cosmological particle production: application to preheating
arXiv:2106.06111 · doi:10.1088/1475-7516/2021/09/009
Abstract
We discuss the adiabatic basis dependence of particle number in time-dependent backgrounds. In particular, we focus on preheating after inflation, and show that, for the optimal basis, the time dependence of the produced particle number can be well approximated by a simple connection formula, which can be obtained by analysing Stokes phenomenon in given backgrounds. As we show explicitly, the simple connection formula can describe various parameter regions such as narrow and broad resonance regime in a unified manner.
arXiv comment37 pages, 15 figures, v2: references added, v3:comments added, accepted for publication in JCAP
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- Operational realization of quantum vacuum ambiguities
- Generalized quantum Vlasov equation for particle creation and unitary dynamics
- States of low energy in the Schwinger effect
- QFT approach to dressed particle processes in preheating and non-perturbative mechanism in kinematically-forbidden regime
- Kaluza-Klein Schwinger effect
- Roles of electric field/time-dependent Wilson line in toroidal compactification with or without magnetic fluxes
- The physics of adiabatic particle number in the Schwinger effect
- More on scattering processes of dressed particles with a time-dependent mass