quant-ph math-ph math.MP physics.atom-ph 34M04, 42A16, 70K60, 34C15 (primary) 15A67, 70F07, 78A35, 78A40
  (secondary)
Hydrogen atom as a nonlinear oscillator under circularly polarized light: epicyclical electron orbits
Quirino Sugon Jr Clint Dominic G. Bennett Daniel J. McNamara