Definitions for quantum mechanics
Random House Webster's College Dictionary
(used with a sing. v.) a quantum theory of the mechanics of atoms, molecules, and other physical systems subject to the uncertainty principle.
Origin of quantum mechanics:
the branch of quantum physics that accounts for matter at the atomic level; an extension of statistical mechanics based on quantum theory (especially the Pauli exclusion principle)
The branch of physics which studies matter and energy at the level of atoms and other elementary particles, and substitutes probabilistic mechanisms for classical Newtonian ones.
Something overly complicated or detailed.
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