Stationary state
In
quantum mechanics, a stationary state is an
eigenstate of a
Hamiltonian, or in other words, a state of definite energy. It is called stationary because the corresponding probability density has no time dependence.As an eigenstate of the Hamiltonian, a stationary state is not subject to change or decay (to a lower energy state). In practice, stationary states are never truly "stationary" for all time. Rather, they refer to the eigenstate of a Hamiltonian where small
perturbative effects have been ignored. The language allows one to discuss the eigenstates of the unperturbed Hamiltonian, whereas the perturbation will eventually cause the stationary state to decay. The only true stationary state is the ground state.
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ground state
Noun
1. (physics) the lowest energy state of an atom or other particle
(hypernym) state
(classification) physics, physical science, natural philosophy
ground state
Compare with
excited state .The lowest energy state for an atom or molecule. When an atom is in its ground state, its electrons fill the lowest energy orbitals completely before they begin to occupy higher energy orbitals, and they fill subshells in accordance with
Hund's rule (usually!)
ground state
ground state
Eng: ground state
Urdu: زمینی سَطَح ۔ کِسی ذَرّے کے نِظام کی مُمکِنہ سَب سے نِچلی توانائی کی سَطَح ۔
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