Single logical qubit information encoding scheme with the minimal optical decoherence-free subsystem

被引：28

作者：

Dong, Li ^{[1
]}

Wang, Jun-Xi ^{[1
]}

Li, Qing-Yang ^{[1
]}

Shen, Hong-Zhi ^{[2
]}

Dong, Hai-Kuan ^{[1
]}

Xiu, Xiao-Ming ^{[1
,3
]}

Gao, Ya-Jun ^{[1
]}

机构：

[1] Bohai Univ, Coll Math & Phys, Jinzhou 121013, Peoples R China

[2] Dalian Univ Technol, Sch Phys & Optoelect Technol, Dalian 116024, Peoples R China

[3] Natl Univ Singapore, Ctr Quantum Technol, Singapore 117543, Singapore

来源：

OPTICS LETTERS | 2016年 / 41卷 / 05期

基金：

中国国家自然科学基金;

关键词：

QUANTUM COMPUTATION; HIGH-SPEED; COHERENCE; NOISE;

D O I：

10.1364/OL.41.001030

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a scheme for encoding single logical qubit information, which is immune to collective decoherence acting onHilbert space spanned by the corresponding states. The scheme needs a spatial entanglement gate and a polarization entanglement gate, which are realized with the assistance of weak cross-Kerr nonlinear interaction between photons and coherent states via Kerr media. Under the condition of sufficient large phase shifts, single logical qubit information can be encoded into this minimal optical decoherence-free subsystem with near-unity fidelity. Together with the mature techniques of measurement and classical feed forward, simple linear optical elements are applied to complete the encoding task, which offers the feasibility of this scheme for protecting quantum information against decoherence. (C) 2016 Optical Society of America

引用

页码：1030 / 1033

页数：4

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