2 dimensional quantum mechanical situation

[captain]

what would a parity operator do in a 2 dimensional quantum mechanical situation (since it can't simply be 180 degree rotation)? also is parity violated in weak interations because the amplitude changes if the parity operator is applied?

 

[malawi_glenn]

I would say it mirrors the spatial coordinates. x becomes -x and y becomes -y.

Yes parity is violated in weak interactions.