if 2 hermitian operator A, B is commute, then AB=BA, the expectation value <.|AB|.>=<.|BA|.>. how about if A and B is non commute operator? so we can not calculate the exp value <.|AB|.> or <.|BA|.>?(adsbygoogle = window.adsbygoogle || []).push({});

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# Expectation value for non commuting operator

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