Andrei Linde develops models of cosmic inflation and the transition to the subsequent hot cosmic state. His work with Lev Kofman and Alexei Starobinsky explained how coherent inflaton oscillations can transfer energy through parametric resonance.
In an expanding background the amplification need not follow the simple periodic pattern of a fixed-frequency oscillator. Their study treated successive production events, backreaction and rescattering, establishing when efficient preheating occurs within the model. Producing particles and reaching thermal equilibrium remain distinct stages.[ref]
Towards the Theory of Reheating After Inflation by Lev Kofman and others. Abstract and introduction: expanding-background resonance and stages of preheating
Portrait of Andrei Linde
. Hypermultiplet; own-work portrait taken 11 July 2018. CC BY-SA 4.0, via Wikimedia Commons. Source. Articles by others on the same topic
Andrei Linde is a prominent theoretical physicist and cosmologist, best known for his work on the theory of inflation in the early universe. Born on March 2, 1948, in Tashkent, Uzbekistan (then part of the Soviet Union), he has made significant contributions to the understanding of cosmological phenomena, particularly how the universe expanded rapidly in its earliest moments.