FTP, identify this  principle of quantum mechanics concerning momentum and position.
It explains why an harmonic oscillator has a zero-point energy  greater than zero. It stems from the fact that the x-hat operator  does not commute with the p-hat operator, but the x-hat-squared and  p-hat-squared operators do commute, and can be stated by the  equation delta x times delta p is approximately equal to Planck's  constant and is greater than h-bar over two. FTP, identify this  principle of quantum mechanics concerning momentum and position.
It explains why an harmonic oscillator has a zero-point energy  greater than zero.
Heisenberg {Uncertainty} Principle