Fractal dynamics in the ionization of helium Rydberg atoms

Xu Xiulan¹, Zhang Yanhui^{1, †,}, Cai Xiangji², Zhao Guopeng¹, Kang Lisha¹

(a) For hydrogen Rydberg atoms in parallel electric and magnetic fields, the fractal dimension as a function of the scaled magnetic field at fixed scaled energy ɛ = −1.3. (b) Fractal dimension as a function of the scaled energy under a fixed scaled magnetic field B = 3.5.