Hi, I have this quesiton for a problem sheet:(adsbygoogle = window.adsbygoogle || []).push({});

Use the unit operator to show that a Hermitian operator A can be written in terms of its orthonormal eigenstates ln> and real eigenvalues a as :

A=(sum of) ln>a<nl

and hence deduce by induction that A^k = (sum of) ln>a^k<nl

I have no idea where to begin and was wondering if someone could give me some pointers and help me work through it. Also, sorry about my notation

Thanks :)

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# Operators and Commutators help

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