annihilation operator

(redirected from Creation and annihilation operators)
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annihilation operator

[ə‚nī·ə′lā·shən ¦äp·ə‚rād·ər]
(quantum mechanics)
An operator which reduces the occupation number of a single state by unity; for example, an annihilation operator applied to a state of one particle yields the vacuum. Also known as destruction operator.
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