Instead, we have to solve directly the corresponding Heisenberg equation, which leads to For the shift operator the classical and quantum equations of motion are completely different.

Find out how air source heat pumps work, how much they cost, how efficient they are, and their pros and cons.

In a Steer-by-Wire (SbW) system, the mechanical linkages which connect the steering wheel to front wheels are replaced by a digitally controlled steering system. In spite of improved vehicle safety ...