The spectral diffusion theory developed for explaining the logarithmic temporal broadening of the optical line of an individual impurity center and based on spontaneous tunnel transitions in a polymer or glass is supplemented by taking into account the tunnel transitions occurring in the center itself upon the absorption of a photon. This light-induced additional tunneling leads to a sharp temporal broadening of the optical line from an individual impurity molecule occurring against the background of a slower logarithmic line broadening. It is shown that the inclusion of light-induced tunneling can explain the difference in the temporal line broadening of three individual Terylene molecules introduced in polyethylene, which was measured in experiments by the group headed by M. Orrit [A. M. Boiron et al., Chem. Phys. 247, 119 (1999)].
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机译：为解释单个杂质中心的光线的对数时间展宽而开发的光谱扩散理论，并基于聚合物或玻璃中自发的隧道跃迁，通过考虑吸收光子后在中心本身发生的隧道跃迁来补充。光子这种光诱导的附加隧穿导致在对数线变宽较慢的背景下，来自单个杂质分子的光线出现了急剧的时间变宽。结果表明，引入光诱导隧穿可以解释引入聚乙烯中的三个单独的Ter烯分子的时间线展宽的差异，这是在实验中由M. Orrit领导的小组测得的。 M.Boiron et al。，化学。物理247，119（1999）]。
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