New posts in Dirac Equation

Why is helicity a good quantum number while spin isn't?

Why are Lagrangians linear in $\dot{q}$ so ubiquitous? Gauge theory, Berry phase, Dirac Equation, and more

What are the theoretical / mathematical problems in discarding negative solutions of Dirac equation?

How would we know that Dirac equation does not describe composite spin-1/2 fermions?

Physical interpretation of gamma matrices

Dirac equation without $i$

Dirac equation in 1+1D spacetime compared to "standard" 3+1D Dirac equation

What spinor field corresponds to a forwards moving positron?

Which one is more fundamental in nature: matter or radiation?

$(c^{\mu}\partial_{\mu}-m)\phi(x)=0$ not Lorentz-invariant?