Hi Guys, I am facing a problem playing around with some operators and Kets, would like some help!(adsbygoogle = window.adsbygoogle || []).push({});

I have [tex]\langle \Psi | A+A^\dagger | \Psi \rangle .A [/tex]

Could someone simplify it? Especially is there a way to change the last operator A into A^\dagger?

The way I thought about this is:

[tex]

=(\langle \Psi |A | \Psi \rangle + \langle \Psi | A^\dagger | \Psi \rangle).A

=(\langle \Psi |A A | \Psi \rangle + \langle \Psi | A^\dagger A | \Psi \rangle)

=\langle \Psi | I | \Psi \rangle

[/tex]

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# Operator and Dirac Algebra

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