Optimal control for suppressing wave packet spreading with strong non-resonant laser pulses
Optimal control for suppressing wave packet spreading with strong non-resonant laser pulses
复制标题
强非谐振激光脉冲抑制波包扩展的优化控制
DOI：
10.1103/physreva.104.033107
复制
发表时间：
2021
影响因子：
2.9
通讯作者：
K. Ohmori
中科院分区：
文献类型：
--
作者：
Y. Ohtsuki;T. Namba;H. Katsuki;K. Ohmori
本文采用非线性最优控制仿真方法，系统地研究了如何抑制强非谐振近红外激光脉冲的波包传播，并以振动波包为例进行了研究。由于可以通过调节泵浦脉冲形状来控制振动波包的扩散程度，因此可以将振动波包作为研究非谐振激光脉冲抑制扩散的原型系统。我们根据在每个振动周期中解析定义的初始激发态中找到波包的概率来定量地定义扩频抑制。从最优控制仿真和使用模拟最优脉冲的模型高斯脉冲序列的仿真中，我们得出结论，只要扩散程度不太大，一个简单的周期性近红外脉冲序列无需调整时间宽度、幅度或照射时间，几乎可以完美地阻止波包在长控制周期内的扩散。
We use nonlinear optimal control simulation to systematically examine how to suppress wave-packet spreading with strong nonresonant near-infrared (NIR) laser pulses through a case study of a vibrational wave packet in thestate of. As the degree of spreading of the vibrational wave packet is controllable by adjusting the pump pulse shape, the vibrational wave packet may be regarded as a prototype system to study spreading suppression by using nonresonant laser pulses. We quantitatively define spreading suppression in terms of the probability of finding the wave packet in the analytically defined, initially excited state at every vibrational period. From optimal control simulation and simulation by using model Gaussian pulse trains that mimic optimal pulses, we conclude that a simple periodic NIR pulse trainwithouthighly tuned temporal widths, amplitudes, or irradiation timings can almost perfectly stop the wave-packet spreading over a long control period, provided that the degree of spreading is not too large.