Formula_14290

\[\left\langle\left(\Delta X_{1}\right)^{2}\right\rangle\left\langle\left(\Delta X_{2}\right)^{2}\right\rangle \geqslant \frac{1}{4}\left|\left\langle X_{1} X_{2}-X_{2} X_{1}\right\rangle\right|^{2}=\frac{1}{16},\]