Heisenberg picture

Etymology
Largely due to in 1925.

Noun

 * 1)  A formulation of quantum mechanics in which the operators (observables and others) incorporate a dependency on time, but the state vectors are time-independent, an arbitrary fixed basis rigidly underlying the theory. It stands in contrast to the Schrödinger picture in which the operators are constant, and further serves to define a third, hybrid picture, the interaction picture.