FIG. 4.

Comparison of the spin expectation values for the spin-adiabats near the crossing in Fig. 2 for a strong magnetic field (B_y = 5 T). (Top) The norm of the spin for our TDA spin-adiabats (states 4–7), e.g., $N_4={⟨S_{44}^x⟩}^2+{⟨S_{44}^y⟩}^2+{⟨S_{44}^z⟩}^2$. (Bottom) The relative angle of the spin vectors with the magnetic field direction ($\overrightarrow{y}$).