Relation between inverse emission and absorption rates for multiphonon transitions

摘要

The relation between inverse emission and absorption rates for multiphonon transitions is investigated through detailed balancing and also through specific quantumhyphen;mechanical models of these transitions. The forced absorption rate is much smaller than the forced emission rate, not equal as in the case of radiative transitions. Because the process corresponding to spontaneous multiphonon emission atT=0thinsp;deg;K does not persist undiminished at higher temperatures, the separation of multiphonon emission into spontaneous and forced components is physically imprecise.