An Aharonov-Anandan phase gate in the sub-Hilbert space of a coupling flux qubits system  

作　　者：郑国林 邓辉 吴玉林 王新强 陈莺飞 郑东宁 

机构地区：[1]College of physics, Chongqing University [2]Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics B》2012年第7期146-151,共6页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China (Grant Nos. 2011CBA00106 and 2009CB929102);the National Natural Science Foundation of China (Grant Nos. 11161130519 and 10974243);the Fundamental Research Funds for the Central Universities, China (Grant No. CDJXS11100012)

摘　　要：We study two flux qubits with a parameter coupling scenario. Under the rotating wave approximation, we truncate the 4-dimensional Hilbert space of a coupling flux qubits system to a 2-dimensional subspace spanned by two dressed states ｜01} and ｜10}. In this subspace, we illustrate how to generate an Aharnov Anandan phase, based on which, we can construct a NOT gate （as effective as a C-NOT gate） in this coupling flux qubits system. FinMly, the fidelity of the NOT gate is also calculated in the presence of the simulated classical noise.We study two flux qubits with a parameter coupling scenario. Under the rotating wave approximation, we truncate the 4-dimensional Hilbert space of a coupling flux qubits system to a 2-dimensional subspace spanned by two dressed states ｜01} and ｜10}. In this subspace, we illustrate how to generate an Aharnov Anandan phase, based on which, we can construct a NOT gate （as effective as a C-NOT gate） in this coupling flux qubits system. FinMly, the fidelity of the NOT gate is also calculated in the presence of the simulated classical noise.

关 键 词：Aharonov Anandan phase sub-Hilbert space coupling flux qubits 

分 类 号：O413.1[理学—理论物理]