Observer (quantum physics)
Concept in quantum physics / From Wikipedia, the free encyclopedia
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Some interpretations of quantum mechanics posit a central role for an observer of a quantum phenomenon.[1] The quantum mechanical observer is tied to the issue of observer effect, where a measurement necessarily requires interacting with the physical object being measured, affecting its properties through the interaction. The term "observable" has gained a technical meaning, denoting a Hermitian operator that represents a measurement.[2]:ā55ā