Development of optimal control simulation and its applications

我们开发了可以处理分子与激光场之间的非线性相互作用的量子最优控制模拟。(1)将该模拟应用于氮气分子的取向控制。从最佳脉冲周期平均强度的功率谱出发，我们提出了一种频率网络机制，它通过拉曼跃迁有效地连接了几个最低的旋转态，从而实现了高度的取向。(2)在CO分子的取向控制中，我们展示了两步控制的有效性，其中取向脉冲出现在取向脉冲之前。(3)我们进一步扩展了模拟，显式地包括了激光脉冲的偏振。它被应用于同时旋转控制，目的是产生线偏振脉冲无法实现的旋转波包。

We have developed quantum optimal control simulation that can treat nonlinear interactions between a molecule and laser fields.(1)The simulation is applied to the alignment control of a nitrogen molecule. From the power spectrum of the cycle-averaged intensity of the optimal pulse, we have proposed a frequency network mechanism that effectively connects a few lowest rotational states through Raman transitions to achieve a high degree of alignment.(2)In the orientation control of a CO molecule, we have shown the effectiveness of a two-step control, in which an alignment pulse appear prior to an orientation pulse.(3)We further extended the simulation to explicitly include the polarization of a laser pulse. It was applied to the simultaneous rovibrational control with the aim of creating a rovibrational wave packet that cannot be achieved by a linearly polarized pulse.