%0 Journal Article
%T The nonadiabatic conditional geometric phase shift in a coiled fiber system<br>螺旋光纤系统中非绝热条件几何相移
%A SHEN Jian-qi
%A Zhuang Fei
%A <br>沈建其
%A 庄飞
%J 物理学报
%D 2005
%I 
%X The nonadiabatic conditional geometric phase gate is required in the topological quantum computation in order to overcome the conflict between the requirement of adiabatic condition(to avoid the severe distortion from the nonadiabaticity to the results) and the removal of decoherence effects. It was demonstrated that the effective Hamiltonian that describes the propagation of photon fields inside the coiled fiber is just the Wang Matsumoto type of Hamiltonian. Thus, the coiled fiber system will automatically generate the nonadiabatic conditional geometric phase shift. In addition, it was shown that the dynamical phase(resulting from the effective Hamiltonian) acquired by the polarized photons vanishes, and the conditional initial state can be easily prepared only by controlling the initial wave vector of photons. In a word, the coiled fiber system can automatically satisfy the requirements and conditions, which were proposed by Wang and Matsumoto in order to create the nonadiabatic conditional geometric phase shift in their NMR scheme.
%K geometric phases
%K coiled fiber system
%K Wang-Matsumoto Hamiltonian
%K topological quantum computation<br>几何相位，
%K 螺旋光纤系统，
%K WangMatsumoto型哈密顿量，
%K 拓扑量子计算
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=9DF0C4FCF231E5F9&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=38B194292C032A66&sid=94D812A784CFA7CC&eid=33C2C2DAF31F219B&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=25