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So spin 0 particles can pass freely through fermions and other particles if there is lack of EM repulsion between them? There is never lack of EM repulsion because baryonic matter is made of charged particles. The superfluid will stay into the container.


Particle on a rotating ring For further discussion purpose, let's considere the dynamics of a quantum particle on a $r_0$ radius rotating circle at a constant angular velocity $\mathbf{\Omega}=\Omega\,\hat{e}_z$ . In cylindrical coordinates, we fix $z=0$, and we have the azimuthal angle $\theta$, which is the "good" degree of freedom describing the ...

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