Entanglement Dynamics of Three Superconducting Charge Qubits Coupled to a Cavity
Yu-Jing Zhao, Xianwu Mi, Shao-Hua Xiang, Fang Zhou, Kehui Song · Communications in Theoretical Physics · 2011
We investigate the entanglement dynamics of a quantum system consisting of three superconducting charge qubits (SCQs) interacting with a microwave field. For separable and entangled states of the SCQs, the evolutions are studied under various photon numbers of cavity field. The results show that the amplitude and period of the bipartite entanglement square concurrences can be controlled by the choice of initial states of SCQs and photon number of cavity field, respectively. This simple model of a quantum register allows us to understand the dynamic process of the quantum storage of information carried by charge qubit.