We consider a model which consists of two coupled superconducting charge qubits by sharing a large Josephson junction.The time evolution of entanglement between two Josephson charge qubits is investigated by employing...We consider a model which consists of two coupled superconducting charge qubits by sharing a large Josephson junction.The time evolution of entanglement between two Josephson charge qubits is investigated by employing the concurrence.We examine the influence of the initial mean photon number,the relative phase and the amplitude of the two qubits on the time evolution of entanglement.The results show that the initial mean photon number,the relative phase and the amplitude of the two qubits play an important role in the evolution of entanglement.展开更多
We consider a model that contains two coupled superconducting charge qubits by sharing a large Josephson junction. We examine the dynamical properties of the linear entropy of two qubits and the probability of both qu...We consider a model that contains two coupled superconducting charge qubits by sharing a large Josephson junction. We examine the dynamical properties of the linear entropy of two qubits and the probability of both qubits being in an excited state. The results show that the initial mean photon number, the initial phase of the field and the relative phase of the two qubits＇ levels play an important role in the evolution of the linear entropy of the two qubits and the probability.展开更多
基金by the National Basic Research Program of China under Grant No 2011CB301801 and the National Natural Science Foundation of China under Grant No 10974039.
文摘We consider a model which consists of two coupled superconducting charge qubits by sharing a large Josephson junction.The time evolution of entanglement between two Josephson charge qubits is investigated by employing the concurrence.We examine the influence of the initial mean photon number,the relative phase and the amplitude of the two qubits on the time evolution of entanglement.The results show that the initial mean photon number,the relative phase and the amplitude of the two qubits play an important role in the evolution of entanglement.
基金Supported by the National Natural Science Foundation of China under Grant Nos 10674038 and 10974039, and the National Basic Research Program of China under Grant No 2006CB302901.
文摘We consider a model that contains two coupled superconducting charge qubits by sharing a large Josephson junction. We examine the dynamical properties of the linear entropy of two qubits and the probability of both qubits being in an excited state. The results show that the initial mean photon number, the initial phase of the field and the relative phase of the two qubits＇ levels play an important role in the evolution of the linear entropy of the two qubits and the probability.
