In deriving the Heisenberg uncertainty relation for 2 general Hermitian operators A and B , the uncertainty operators ΔA and ΔB are introduced defined by ΔA=A - (expectation value of A) and similarly for B.(adsbygoogle = window.adsbygoogle || []).push({});

My question is this - how can you subtract(or add) an expectation value , which is just a number to A which is an operator ?

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# The uncertainty operator and Heisenberg

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