噪声促进的分子飞秒光解离
Femtosecond Photodissociation of Molecules Facilitated by Noise
摘要：
研究了双原子分子在飞秒中红外激光脉冲和高斯白噪声作用下的动力学行为。用带有Morse势的随机薛定谔方程描述了在噪声和激光脉冲作用下分子的振动。对于弱激光强度，远低于解离阈值，它表明，可以找到一个最佳的噪声量，导致解离概率的显着增强。作为噪声和激光强度的函数的增强景观表现出全局最大值。一个频率分辨的增益分布记录与泵浦探测设置，这是实验上可实现的。有了这个配置文件，我们确定的线性和非线性多光子过程中产生的激光和噪声之间的相互作用，并评估其相对贡献的解离增强。
英文摘要：
We investigate the dynamics of diatomic molecules subjected to both a femtosecond mid-infrared laser pulse and Gaussian white noise. The stochastic Schrödinger equation with a Morse potential is used to describe the molecular vibrations under noise and the laser pulse. For weak laser intensity, well below the dissociation threshold, it is shown that one can find an optimum amount of noise that leads to a dramatic enhancement of the dissociation probability. The enhancement landscape which is shown as a function of both the noise and the laser strength, exhibits a global maximum. A frequency-resolved gain profile is recorded with a pump-probe set-up which is experimentally realizable. With this profile we identify the linear and nonlinear multiphoton processes created by the interplay between laser and noise and assess their relative contribution to the dissociation enhancement.
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