Superadiabatic basis in cosmological particle production: application to preheating

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.

37 pages, 15 figures, v2: references added, v3:comments added, accepted for publication in JCAP

References in corpus (8)

• Nonperturbative Dynamics Of Reheating After Inflation: A Review
• The Stokes Phenomenon and Schwinger Vacuum Pair Production in Time-Dependent Laser Pulses
• Breakdown of Semiclassical Methods in de Sitter Space
• Trapped Inflation
• Effects of particle production during inflation
• Super-Adiabatic Particle Number in Schwinger and de Sitter Particle Production
• On Features and Nongaussianity from Inflationary Particle Production
• Decay of Scalar Condensation in Quantum Field Theory

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