%0 Journal Article
%T Linear Entropy and Entanglement in Two-Charge-Qubit Circuits<br>
%A LIAO Qing-Hong
%A FANG Guang-Yu
%A WANG Yue-Yuan
%A AHMAD Muhammad Ashfaq
%A LIU Shu-Tian
%A <br>
%J 中国物理快报
%D 2010
%I 
%X 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.
%K 03
%K 65
%K Ud
%K 89
%K 70
%K Cf<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=83CB9C2A743FFF3C571306CE132960F8&yid=140ECF96957D60B2&vid=DB817633AA4F79B9&iid=DF92D298D3FF1E6E&sid=7801E6FC5AE9020C&eid=2A8D03AD8076A2E3&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=19