Rydberg atom 在微波游離下其電子軌跡的Lyapunov exponent分析

Abstract

在微波的照射下,Rydberg atom 的電子可能會受到游離,而改變 了原本的電子軌跡.我們計算在四種強度的微波下受作用電子軌跡的 Lyapunov exponent來判斷其不規則的程度.當外場越強時,Lyapunov exponent反而越小,也就是說,在外場較小時,電子運動的軌跡反而比較不 規則. A Redberg atom may be ionized under external field.The trajectory of the atomic electron will be driven by the external field.Under four differnet intensities of the external field,we evaluate the Lyapunov exponents of the electron trajectory.By ana;yzing the Lyapunov exponents,we can cpmpare how chaotic these four trajectories are. We find that the Lyapunov exponent is smaller forhigher fields.In other words,when the external field is smaller,the trajectory of the electron is more chaotic.