- #1
carllacan
- 274
- 3
If I understand it correctly Dirac developed his equation because he was looking for a relativistic first order wave equation for the electron, rather than a second-order one like the Klein-Gordon equation.
Why did he wanted a first-order equation? Is it because the probability current is not positive-definite for higher than second order equations?
Why did he wanted a first-order equation? Is it because the probability current is not positive-definite for higher than second order equations?