Entanglement-enhanced quantum error-correcting codes

被引：9

作者：

Dong, Ying ^{[1
,2
]}

Deng, Xiuhao ^{[1
,2
]}

Jiang, Mingming ^{[1
,2
]}

Chen, Qing ^{[1
,2
,3
]}

Yu, Sixia ^{[1
,2
,3
]}

机构：

[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Peoples R China

[2] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Peoples R China

[3] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

来源：

PHYSICAL REVIEW A | 2009年 / 79卷 / 04期

关键词：

decoding; encoding; error correction codes; quantum computing; quantum entanglement;

D O I：

10.1103/PhysRevA.79.042342

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Via explicit examples we show that the pre-existing entanglement can really enhance (not only behave as an assistance for) the efficiency of the quantum error-correcting codes (QECCs) in a single block of encoding or decoding as well as help in beating the quantum Hamming bound. A systematic approach to constructing entanglement-assisted (or enhanced) quantum error-correcting codes (EAQECCs) via graph states is also presented, and an infinite family of entanglement-enhanced codes has been constructed. Furthermore we generalize the EAQECCs to the case of not-so-perfectly protected qubit and introduce the quantity infidelity as a figure of merit and show that the EAQECCs also outperform the ordinary QECCs.

引用

页数：5

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