I need to demonstrate the orthonormality of the eigenfunctions for de cero-spin field.(adsbygoogle = window.adsbygoogle || []).push({});

I mean, <2k,3k> = 0 for example. nk denotes n particles with wave vector k.

I'm trying with the commnutation properties but i´m stuck in the middle of the process.

Is there any other thing i need?

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# Operator number

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