%0 Journal Article
%T Single Qubit and Its Universal Logic Gate Made of a Heisenberg Spin Cluster with Five Particles
%A TAO Jun
%A WANG Shun-Jin
%A <br>陶军
%A 王顺金
%J 中国物理快报
%D 2006
%I 
%X We investigate an anisotropic Heisenberg spin cluster with five particles controlled by a time-dependent magnetic field. With the algebraic dynamical method, we obtain the exact analytical solution to the time dependent Schr6dinger equation. Based on the analytical solution, it is shown that the system can be used as a universal single qubit logic gate controlled by the strength and frequency of the magnetic field, and the six special single qubit logic gates can be realized physically. We also discuss the anti-decoherence property of the qubit and its logic gates resulted from particle coupling effect and collectivity of the cluster.
%K 03
%K 65
%K Fd
%K 03
%K 67
%K -a<br>通用逻辑门
%K 海森堡自旋团簇
%K 单量子比特
%K 五粒子
%K 代数结构
%K 解析解
%K 量子计算机
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=218FA76F4744942FEC1993A117683F80&yid=37904DC365DD7266&vid=EA389574707BDED3&iid=59906B3B2830C2C5&sid=159D47119828ADFD&eid=B3D2DD8622A20B4B&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=13