Multiphonon anharmonic decay of a quantum mode
V. Hizhnyakov
Abstract
A nonperturbative theory of multiphonon anharmonic transitions between energy levels of a local mode is presented. It is shown that the rate of transitions rearranges near the critical level number ncr: at smaller n the process slows down, while at larger n it accelerates in time, causing a jump-like loss of energy followed by the generation of phonon bursts. Depending on parameters, phonons are emitted in pairs, triplets etc.
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