Spanner Michael, Shapiro E A, Ivanov Misha
NRC Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6 Canada.
Phys Rev Lett. 2004 Mar 5;92(9):093001. doi: 10.1103/PhysRevLett.92.093001. Epub 2004 Mar 3.
We show (i) how the evolution of a wave packet created from an initial thermal ensemble can be controlled by manipulating interferences during the wave packet's fractional revivals and (ii) how the wave-packet evolution can be mapped onto the dynamics of a few-state system, where the number of states is determined by the amount of information one wants to track about the wave packet in the phase space. We illustrate our approach by (i) switching off and on field-free molecular axis alignment induced by a strong laser pulse and (ii) converting alignment into field-free orientation, starting with rotationally cold or hot systems.
（i）如何通过在波包分数复苏期间操纵干涉来控制由初始热系综产生的波包的演化；以及（ii）如何将波包演化映射到一个少态系统的动力学上，其中态的数量由人们想要在相空间中追踪的关于波包的信息量决定。我们通过以下方式阐述我们的方法：（i）开启和关闭由强激光脉冲诱导的无场分子轴取向；以及（ii）从旋转冷或热的系统开始，将取向转换为无场定向。
