Formula_19138

\[\begin{gathered}\left\{\psi(x), \psi^{+}\left(x^{\prime}\right)\right\}=\delta\left(x-x^{\prime}\right), \\\left\{\psi(x), \psi\left(x^{\prime}\right)\right\}=0,\left\{\psi^{+}(x), \psi^{+}\left(x^{\prime}\right)\right\}=0 .\end{gathered}\]