CAJ | 학술논문

综述了我们在二能级体系的动态局域化方面所作的工作.通过把受驱二能级体系的量子动力学映射到在二维谐性势场和与之垂直的周期性磁场中粒子的经典动力学,使得对局域化机制理解更为深刻.应用这种方案就可以得到在线性偏振场作用下二能级体系的局域化条件.同时解析地分析了在脉冲场和圆偏振场驱动下二能级体系的局域化,发现圆偏振场诱导的局域化可以由复平面上单位圆中的椭圆完全刻画.
종술료아문재이능급체계적동태국역화방면소작적공작.통과파수구이능급체계적양자동역학영사도재이유해성세장화여지수직적주기성자장중입자적경전동역학,사득대국역화궤제리해경위심각.응용저충방안취가이득도재선성편진장작용하이능급체계적국역화조건.동시해석지분석료재맥충장화원편진장구동하이능급체계적국역화,발현원편진장유도적국역화가이유복평면상단위원중적타원완전각화.
This paper reviews our work on dynamical localization of the two-level system (TLS). By mapping the quantum dynamics of a driven TLS to the classical one of a particle experiencing a two-dimensional harmonic force as well as a periodic magnetic field, deep insights into the mechanism of localization have been gained. Using this scheme we are able to obtain the condition for localization of a TLS subject to the linearly polarized field. The localization induced by δ-function pulses and circularly polarized fields has been analytically investigated. It is found that the circularly-polarized-field induced localization can be fully described by the geometry of an ellipse within a unit circle on a complex plane.