Spinning-particle Dirac quantization
= Spinning-particle Dirac quantization
{title2=$\widehat\zeta^m=\gamma^m/\sqrt2$}
Quantizing the odd <Dirac brackets> yields $\{\widehat\zeta^m,\widehat\zeta^n\}_+=\eta^{mn}$. The <constraint> $p\cdot\zeta=0$ is then the <massless Dirac equation> on a spinor. Its square enforces $p^2=0$, matching the even <constraint>. The spin bilinear is represented by $-i[\gamma^m,\gamma^n]/4$ in this action convention.