  We demonstrate that spin flipping transitions occur between various
quarkonium spin states due to transient magnetic field produced in non central
heavy ion collisions (HICs). The inhomogeneous nature of the magnetic field
results in \textit{non adiabatic evolution} of (spin)states of quarkonia moving
inside the transient magnetic environment. Our calculations explicitly show
that the consideration of azimuthal inhomogeneity gives rise to dynamical
mixing between different spin states owing to Majorana spin flipping. Notably,
this effect of non-adiabaticity is novel and distinct from previously predicted
mixing of the singlet and one of the triplet states of quarkonia in the
presence of a static and homogeneous magnetic field.
