Quick dirac notation question

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QuantumOverlord
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Annoyed with myself for forgetting this, I just want to check this is okay.

<Q|AB|P>=<Q|A|P><Q|B|P>

The context is Nuclear physics. I am trying to get the expectation of the magnetic moment of the nucleus <u>. It works if <J|(g_nucleus)J|J>=<J|(g_nucleus)|J><J|J|J>
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WishingChaff
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You should use the identity operator to split bra-ket in this manner.

Using  \sum_{i} |i&gt;&lt;i| you can insert this into you equation to give:

 &lt;Q|AB|P&gt; = \sum_{i} &lt;Q|A|i&gt;&lt;i|B|P&gt;

You can obviously use a continuous version, providing you pick the correct eigenstates.

(Original post by QuantumOverlord)
Annoyed with myself for forgetting this, I just want to check this is okay.

<Q|AB|P>=<Q|A|P><Q|B|P>

The context is Nuclear physics. I am trying to get the expectation of the magnetic moment of the nucleus <u>. It works if <J|(g_nucleus)J|J>=<J|(g_nucleus)|J><J|J|J>
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