Dirac's Coupling to an electromagnetic field and schroedingers

[g.bashyam]

hi
i just read this article,which discussed about getting the Schroedinger's equation for a particle in a em field by transforming the psi, http://www.vttoth.com/gauge.htm .can anyone please tell me if we can get the dirac's equation for a particle in a em field by transforming the psi
thanks in advance!
regards
bashyam govindhan

 

[dextercioby]

As far as I know, the same calculations can be made for the Dirac Hamiltonian.

 

[Meir Achuz]

That webpage is a bit complicated. To put the EM interaction into any QM wave equation
(Schrödinger or Dirac) the substitution del-->del-iqA works.
The transformation of the psi is part of the gauge transformation which works if the form
del-iqA is used.
( gave up on the latex.)