Multiphonon anharmonic decay of a quantum mode

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 $n_{cr}$: 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.

submitted to Europhys.Lett

References in corpus (3)

• Discrete Breathers
• Stepwise quantum decay of self-localized solitons
• Multiphonon decay of strong mode in quantum lattice

Cited by in corpus (2)

• Stability of quantum breathers
• Structure and time-dependence of quantum breathers