Preprint
Sep 2026
Time evolution of scalar condensate decay
A scalar field, which oscillates coherently over the space and decays through production of daughter particles, plays an important role in cosmology. It was recently shown that the parametric-resonance and Feynman-diagrammatic approaches give the same decay rate for a Bosonic daughter particle at a large time duration....
Ayuki Kamada, K. Sakurai
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