Orientation of KRb molecules in a switched electrostatic field

• Published in: Chinese physics B 2013-05, Vol.22 (5), p.290-294, Article 053701
• Main Author: 黄云霞 徐淑武 杨晓华
• Format: Article
• Language: English
• Subjects: Adiabatic flow; Electrostatic fields; Mathematical models; Orientation; Rotational; Schroedinger equation; Strength; Switching; 分子取向; 开关时间; 数值求解; 时间依赖性; 电场强度; 相互作用; 转动温度; 静电场
• ISSN: 1674-1056; 2058-3834; 1741-4199
• DOI: 10.1088/1674-1056/22/5/053701

We theoretically investigate the orientation of the cold KRb molecules induced in a switched electrostatic field by numerically solving the full time-dependent Schr6dinger equation. The results show that the periodic field-free molecular orientation can be realized for the KRb molecules by rapidly switching off the electrostatic field. Meanwhile, by varying the switching times of the electrostatic field, the adiabatic and nonadiabatic interactions of the molecules with the applied field can be realized. Moreover, the influences of the electrostatic field strength and the rotational temperature to the degree of the molecular orientation are studied. The investigations show that increasing the electrostatic field will increase the degree of the molecular orientation, both in the constant-field regime and in the field-free regime, while the increasing of the rotational temperature of the cold molecules will greatly decrease the degree of the molecular orientation.