In lectures, I learned that in first order perturbation, [itex]\hat{H}_0[/itex] term cancels with [itex]E_0[/itex] term because [itex]\hat{H}_0[/itex] is Hermitian. What property does Hermitian operators hold that cancels with the unperturbed energy?(adsbygoogle = window.adsbygoogle || []).push({});

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# I First order perturbation derivation

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