I read this article:
https://journals.aps.org/prl/cited-by/10.1103/PhysRevLett.117.062502
"Probing Resonances of the Dirac Equation with Complex Momentum Representation"
A powerful method to solve the resonance solutions of the Dirac equation is invented. That method is based on the momentum-space representation of the Dirac Hamiltonian.
Then I summarize some other articles citing the above one.
2017Fang:
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.95.024311
2018Shi:
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.97.064301
"Combination of complex momentum representation and Green's function methods in relativistic mean-field theory"
2018KeMeng:
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.98.014316
2019Wang_Niu:
https://iopscience.iop.org/article/10.1088/1361-6471/ab4a9b
"Probing the resonance of Dirac particle in therelativistic point-coupling model by complex-momentum-representation method"
2019Cao:
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.99.024314
"Systematic studies of the influence of single-particle resonances on neutron halo and skin in the relativistic-mean-field and complex-momentum-representation methods"
2020Cao:
https://journals.aps.org/prc/abstract/10.1103/PhysRevC.102.044313
"Exploration of the exotic structure in Ce isotopes by the relativistic point-coupling model combined with complex momentum representation"
2020Luo:
https://iopscience.iop.org/article/10.1088/1361-6471/ab92e2
"Investigation of exotic structure in 34Na by complex momentum representation combined with Green's function method"
2020Zhang: