Stationary state
Quantum state with all observables independent of time / From Wikipedia, the free encyclopedia
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For the concept used in classical economics, see Steady-state economy § Concept of the stationary state in classical economics.
A stationary state is a quantum state with all observables independent of time. It is an eigenvector of the energy operator (instead of a quantum superposition of different energies). It is also called energy eigenvector, energy eigenstate, energy eigenfunction, or energy eigenket. It is very similar to the concept of atomic orbital and molecular orbital in chemistry, with some slight differences explained below.