Coherent dynamics of V-type systems driven by time-dependent incoherent radiation.
Coherent dynamics of V-type systems driven by time-dependent incoherent radiation.
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由时间相关的非相干辐射驱动的 V 型系统的相干动力学。
DOI：
10.1063/1.4972140
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
P. Brumer
中科院分区：
文献类型：
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作者：
A. Dodin;T. Tscherbul;P. Brumer
自然界中的光诱导过程是通过缓慢开启的非相干光照射而发生的。本文采用一种新发展的主方程方法，对V型系统的非相干激发随时间变化的一般情况进行了解析求解。当辐射的开启时间超过特征系统时间时，出现了明显的证据表明辐射诱导的相干性消失。后者的情况下，在性质上，所有相关的动力学时间尺度以外的近简并能级。我们估计，在没有非辐射弛豫和退相干的情况下，慢于1 ms的开启时间（按照自然标准仍然很短）只会在间隔小于0.9 cm-1的能量本征态之间引起法诺相干。
Light-induced processes in nature occur by irradiation with slowly turned-on incoherent light. The general case of time-dependent incoherent excitation is solved here analytically for V-type systems using a newly developed master equation method. Clear evidence emerges for the disappearance of radiatively induced coherence as turn-on times of the radiation exceed characteristic system times. The latter is the case, in nature, for all relevant dynamical time scales for other than nearly degenerate energy levels. We estimate that, in the absence of non-radiative relaxation and decoherence, turn-on times slower than 1 ms (still short by natural standards) only induce Fano coherences between energy eigenstates that are separated by less than 0.9 cm-1.