In quantum mechanics, a stationary state is an eigenvector of the Hamiltonian, implying the probability density associated with the wavefunction is independent of time. This corresponds to a quantum state with a single definite energy (instead of a probability distribution 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.
Read more about Stationary State: Introduction, Stationary State Properties, Spontaneous Decay, Comparison To "orbital" in Chemistry
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... involved molecules (Here atoms, full or parts of molecules or crystals..) jump from a stationary state to another stationary state ... interactions in which the involved molecules are excited to a non-stationary state during the interaction and return to their initial state ...
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... anticipated the transition from economic growth to a "stationary state." In his magnum opus, Principles of Political Economy, he wrote...the increase of wealth is ... The end of growth leads to a stationary state ... The stationary state of capital and wealth… would be a very considerable improvement on our present condition ...
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