Added my notebook

[UlrikTJ]

I (Ulrik) made this notebook visualizing the wigner function for normal fock states and squeezed fock states.

[review-notebook-app]

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[marianabagulho]

I really like this notebook. Everything is well explained and I like the plots and the legends on them. I don't really have a suggestion on improving because it all is really good.

[yamoceans]

I like the notebook.
It explains the necessities regarding Wigner Function and there are some very very beautiful plots. I also love the interactability of the plots.
I suppose the theory can be further expanded for example maybe adding something about phase space, but I think this is a good first draft.