## \hat{A}=(adsbygoogle = window.adsbygoogle || []).push({});

\begin{pmatrix}

1 &- 1 \\

-1&1

\end{pmatrix}

##

this is written in a basis ##\left ( |1>,|2> \right )##

So, i know this is an Hermitian operator, so it can represent an observable.

Can this operator represent an electric dipole moment? A momentum? A component of the orbital angular momentum?

1- for the momentum, i assume, since we can write ##\hat{p} ## as creation and annihilation operators, this would have no diagonal terms in this basis. What about the others, any suggestions?

Thank you!

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# I What can this observable represent?

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