不确定关系

$$\begin{array}{r}\mathrm{\Delta }x\mathrm{\Delta }{p}_x\ge \frac{\hslash }{2}\\ \mathrm{\Delta }y\mathrm{\Delta }{p}_y\ge \frac{\hslash }{2}\\ \mathrm{\Delta }z\mathrm{\Delta }{p}_z\ge \frac{\hslash }{2}\\ \mathrm{\Delta }E\mathrm{\Delta }t\ge \frac{\hslash }{2}\end{array}$$