Control of entanglement sudden death induced by Dzyaloshinskii-Moriya interaction
Qiang Zheng, Sun Ping, Xiaoping Zhang, Ren Zhong-Zhou · Chinese Physics C · 2010
We investigate the entanglement dynamics of a system composed of two non-interacting qubits, A and B. A third qubit, C, only has the Dzyaloshinskii-Moriya (DM) spin-orbit interaction with qubit B. We find that the DM interaction can induce the entanglement sudden death (ESD) of the system qubits A and B, and properly mixing the initial state of the system and adjusting the state of qubit C are two effective methods of controlling ESD.