Formula_2664

\[\hat{\varphi}(t, \boldsymbol{r} ; 1)=\hat{\psi}^{+}(t, \boldsymbol{r}), \hat{\varphi}(t, \boldsymbol{r},-1)=\hat{\psi}(t, \boldsymbol{r}) ; \hat{\psi}^{+}, \hat{\psi}\]