Stationary Entanglement of Two Charge Qubits Induced by a Damped and Driven Cavity  

作　　者：李军刚 邹健 蔡金芳 邵彬 

机构地区：[1]Department of Physics, Beijing Institute of Technology, Beijing 100081

出　　处：《Chinese Physics Letters》2006年第3期708-711,共4页中国物理快报（英文版）

基　　金：Supported by the National Natural Science Foundation of China under Grant No 10374007.

摘　　要：Two charge qubits located inside a damped driven cavity is considered. The dynamical evolution of the entanglement between the two qubits is demonstrated analytically or numerically. It is found that with the cavity dissipation, the steady entanglement between the two qubits is sensitive to the initial state of the qubits, but independent of the cavity field＇s initial state. The two qubits initially in the separable and most mixed state can be more easily entangled. The external field can be used to enhance the steady entanglement between the two charge qubits.Two charge qubits located inside a damped driven cavity is considered. The dynamical evolution of the entanglement between the two qubits is demonstrated analytically or numerically. It is found that with the cavity dissipation, the steady entanglement between the two qubits is sensitive to the initial state of the qubits, but independent of the cavity field＇s initial state. The two qubits initially in the separable and most mixed state can be more easily entangled. The external field can be used to enhance the steady entanglement between the two charge qubits.

关 键 词：SEPARABILITY FIELD 

分 类 号：O441.1[理学—电磁学]