Enhancement of long-wave vibronic interaction and quantum diffusion in liquids

Abstract

Abstract The zero-phonon type hoping motion of atoms in the solid and liquid phases, causing quantum diffusion, is considered. It was found that due to the previously discovered significant enhancement of vibronic interaction with long-wave acoustic phonons, this motion in liquids can be significantly amplified compared to the solid phase of the same substance at a close temperature. Quantum diffusion may be particularly important in superfluid He.