energy correction / rst law / energy eigenfunction / particles energy spectrum / graphical solution / projection operator / possible energy / noncommutable operators / energy bands / energy level / average energy / decay law / kinetic energy / energy eigenvector / position vector operator / idempotent operator / centrifugal energy / composite systems / dot product / creation operator / high-energy / macroscopic measuring device / energy measurement / energy spectrum / quantum detection operators / ionization energy / density operator / identity operator / energy / /