The title is taken from a recent review posted to the arXiv.
When we speak of quantum mechanical systems, what usually comes to mind are optical, electrical, and magnetic phenomena associated with atoms, molecules or solids. Rarely do we think of mechanical systems per se.
The review discusses progress in cooling nanoscale mechanical systems to the ground state, and then measuring position and momentum. Remembering the peculiarities of quantum mechanics, it is evident that measuring location of such an object, for example, disturbs the very location being measured. Nevertheless, the ground state motion of nanomechanical systems has been observed.