New Approach to $N$-body Relativistic Quantum Mechanics
  In this paper, we propose a new approach to the relativistic quantum mechanics for many-body, which is a self-consistent system constructed by juxtaposed but mutually coupled nonlinear Dirac's equations. The classical approximation of this approach provides the exact Newtonian dynamics for many-body, and the nonrelativistic approximation gives the complete Schr\"odinger equation for many-body. 
Ying-Qiu Gu