Perhaps, one inflaton falls, in one quantum jump, from supercool to zero energy, which acts as a seed for other inflatons to fall, so inflation-stopping spreads at light speed {bubble nucleation}. Perhaps, inflatons have different energies and fall through many quantum jumps. Some high-energy inflatons cannot fall back down, because other inflatons already fill lower energy levels. Inflation-stopping does not spread, prolonging inflation. Different space points have different periods of inflation (chaotic inflation).
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Date Modified: 2022.0224