Evidence of quantum ergodicity in stimulated emission pumping spectra of acetylene

摘要

We investigate the stimulated emission pumping (SEP) spectra of the acetyleneXtilde;thinsp;1sum;+gstate near 27thinsp;900 cmminus;1of vibrational excitation for evidence of quantum ergodicity. The spectra consists of clumps of narrowly spaced lines which arise from transitions into levels with the same lower stateJlsquo;value. Thus, the structure within each clump is purely vibrational. We apply criteria for spectral ergodicity and examine nearesthyphen;neighbor spacing distributions to test the spectra for signs of ergodic molecular dynamics. The criteria applied suggest that the molecular dynamics is nearly ergodic.