Analytic Solution of Strongly Coupling Schroedinger Equations
  A recently developed expansion method for analytically solving the ground states of strongly coupling Schr\"odinger equations by Friedberg, Lee and Zhao is extended to excited states and applied to the pedagogically important problems of power-law central forces. With the extended method, the Hydrogen atom problem is resolved and the low-lying states of Yukawa potential are approximately obtained. 
Jinfeng Liao, Pengfei Zhuang