## Numerical Methods and Comparison for the Dirac Equation in the Nonrelativistic Limit Regime

- Weizhu Bao, Yongyong Cai, Xiaowei Jia, Qinglin Tang
- J. Sci. Comput.
- 2017

The Dirac equation for an electron in an external electromagnetic field can be regarded as a singular set of linear equations for the vector potential. Radford’s method of algebraically solving for the vector potential is reviewed, with attention to the additional constraints arising from non-maximality of the rank. The extension of the method to general… (More)