In many theories of reheating starting from the classical spatially homogeneous inflaton field, its accompanying inhomogeneous part (which arises from primordial quantum fluctuations) is treated as a first order perturbation. We examine some consequences of treating it non-perturbatively in a model where a first order treatment is invalid. In particular we consider effects on the long-wavelength curvature parameter ζ. (C) 2000 Elsevier Science B.V.
Imaanpur, A. (2000). Inflaton particles in reheating. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 492(3–4), 331–338. https://doi.org/10.1016/S0370-2693(00)01002-9