How to make relativistic correction to perturbation?

[zhanhai]

I want to know about relativistic correction to perturbation.

I searched but failed to find any teaching on this topic. Is it true that we just need to replace the non-relativistic Hamiltonian perturbation terms with the relativistic ones while leaving the perturbation formulae unchanged?

Thank for all reply and comments.

Regards,

 

[Jano L.]

What calculation do you have on mind?