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Linear Entropy and Entanglement in Two-Charge-Qubit Circuits |
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| Authors: | LIAO Qing-Hong FANG Guang-Yu WANG Yue-Yuan AHMAD Muhammad Ashfaq LIU Shu-Tian |
| Institution: | Department of Physics, Harbin Institute of Technology, Harbin 150001 Key Laboratory for Advanced Functional Materials and Excited State Process of Heilongjiang Province, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025 Department of Physics, COMSATS Institute of Information Technology, Lahore 54000, Pakistan |
| Abstract: | 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. |
| Keywords: | 03 65 Ud 89 70 Cf |
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