Deterministic implementations of fermionic quantum SWAP and Fredkin gates for spin qubits based on charge detection  

作　　者：王洪福 张寿 朱爱东 

机构地区：[1]Department of Physics,College of Science,Yanbian University,Yanji 133002,China

出　　处：《Chinese Physics B》2012年第4期88-92,共5页中国物理B（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11147174, 61068001, 11165015, and 11064016);the Talent Program of Yanbian University of China (Grant No. 950010001)

摘　　要：We propose a scheme to implement fermionic quantum SWAP and Fredkin gates for spin qubits with the aid of charge detection. The scheme is deterministic without the need of qubit qubit interaction, and the proposed setups consist of simple polarizing beam splitters, single-spin rotations, and charge detectors. Compared with linear optics quantum computation, this charge-measurement-based qubit scheme greatly enhances the success probability for ira- plementing quantum SWAP and Fredkin gates and greatly simplifies the experimental realization of scalable quantum computers with noninteracting electrons.We propose a scheme to implement fermionic quantum SWAP and Fredkin gates for spin qubits with the aid of charge detection. The scheme is deterministic without the need of qubit qubit interaction, and the proposed setups consist of simple polarizing beam splitters, single-spin rotations, and charge detectors. Compared with linear optics quantum computation, this charge-measurement-based qubit scheme greatly enhances the success probability for ira- plementing quantum SWAP and Fredkin gates and greatly simplifies the experimental realization of scalable quantum computers with noninteracting electrons.

关 键 词：SWAP gate Fredkin gate charge detection 

分 类 号：O469[理学—凝聚态物理]