Optimal alignment control of a nonpolar molecule through nonresonant multiphoton transitions

被引:14
|
作者
Nakagami, Kazuyuki [1 ]
Mizumoto, Yoshihiko [1 ,2 ]
Ohtsuki, Yukiyoshi [1 ,2 ]
机构
[1] Tohoku Univ, Grad Sch Sci, Dept Chem, Sendai, Miyagi 9808578, Japan
[2] Japan Sci & Technol Agcy, CREST, Kawaguchi, Saitama 3320012, Japan
来源
JOURNAL OF CHEMICAL PHYSICS | 2008年 / 129卷 / 19期
基金
日本学术振兴会;
关键词
molecule-photon collisions; multiphoton processes; nitrogen; optimal control; polarisability; rotational states; topology;
D O I
10.1063/1.3010369
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Alignment control of an ensemble of nonpolar molecules is numerically studied by means of optimal control simulation. A nitrogen molecule that is modeled by a quantum rigid rotor is adopted. Controlled rotational wave packets are created through nonresonant optical transitions induced by polarizability coupling. Optimal pulses are designed to achieve the alignment control at a specified time in the absence/presence of external static fields in zero- and finite-temperature cases, as well as to maintain an aligned state. When maintaining an aligned state over a specified time interval is chosen as a target, the control mechanism is primarily attributed to a dynamical one. Multiple optimal solutions that lead to virtually the same control achievement are found, which are consistent with the topology of the quantum control landscape.
引用
收藏
页数:9
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