Dynamic magnetic field entanglement stabilization

A method for stabilizing oscillations and maximizing entanglement in a decoherence free Heisenberg spin dimer using a time varying magnetic field is presented. Unentangled and fully entangled initial states are investigated. A stabilizing magnetic field intensity function was found for both initial states. These time varying magnetic field intensity functions are different from each other, implying that the magnetic intensity variation needed to stabilize the system depends on the initial state. The time varying magnetic field functions were found using simulated annealing optimization. This work proves that it is possible to remove the oscillatory nature of entanglement and maximize entanglement in decoherence free systems. (C) 2021 Optical Society of America