Exact numerical simulations of parametric resonance in φ⁴ preheating reveal coupling-dependent behaviors: short-wavelength modes saturate while long-wavelength modes grow gradually in the weak regime, with stochastic and staircase-like production appearing at stronger couplings, differing from prior
Brandenberger, and Richard A
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Parametric Resonance in $\phi^4$ Preheating: An Exact Numerical Study
Exact numerical simulations of parametric resonance in φ⁴ preheating reveal coupling-dependent behaviors: short-wavelength modes saturate while long-wavelength modes grow gradually in the weak regime, with stochastic and staircase-like production appearing at stronger couplings, differing from prior