In one minute

Peter Hagelstein gives an overview of his models for excess heat in the Fleischmann-Pons experiment. More than two decades after the effect was announced, he reviews the approaches pursued in search of a coherent theoretical explanation. The effect is prodigious and helium-4 appears correlated with the energy, yet energetic particles matching that energy are absent. That led him to models that split a large energy quantum into many small ones, which the lossy spin-boson model appears to achieve. Coherent energy exchange in that limit, together with excitation transfer, describes a new set of reactions relevant to the experiments. The resulting models give interpretations for numerous experimental observations that textbook nuclear and condensed matter physics do not explain.

Bird's Eye View of Phonon Models for Excess Heat in the Fleischmann-Pons Experiment