Anisotropy-exchange resonance as a mechanism for entangled state switching

We explore the three-particle spin model of an S1 = 12 particle (e.g., an electron) interacting with two spincoupled S2,3 particles with exchange coupling and magnetic anisotropy. We show that in the case of S2,3 = 1 particles, the coupled particle entanglement states can be prepared, controlled, and read by the S1 particle. We also find that for particular resonance conditions of the magnetic anisotropy strength D and exchange coupling strength J, the entanglement state-switching behavior is maximized and is robust against a range of anisotropic application of the exchange coupling.