Quantum Stoner-Wohlfarth Model

Quantum Stoner-Wohlfarth Model.
Takuya Hatomura, Bernard Barbara, and Seiji Miyashita

Phys. Rev. Lett. 116, 037203 (2016)
 

Beating observed after the SW point. The red line shows the fidelity $s_f$ and the green, blue, and orange lines show $⟨s_z⟩$, $⟨s_x⟩-1.5$, and $⟨s_y⟩-2.5$, where the parameters are $S=20$, $H_x=1$, $D=1$, and $v=0.08$.