Bosonic quantum error correction codes in superconducting quantum circuits  

作　　者：Weizhou Cai Yuwei Ma Weiting Wang Chang-Ling Zou Luyan Sun 

机构地区：[1]Center for Quantum Information,Institute for Interdisciplinary Information Sciences,Tsinghua University,Beijing 100084,China [2]Key Laboratory of Quantum Information,CAS,University of Science and Technology of China,Hefei,Anhui 230026,P.R.China

出　　处：《Fundamental Research》2021年第1期50-67,共18页自然科学基础研究（英文版）

基　　金：This work was supported by National Key Research and Development Program of China(Grant No.2017YFA0304303);the National Natu-ral Science Foundation of China(Grant No.11925404 and 11874235,11874342 and 11922411);Anhui Initiative in Quantum Information Technologies(AHY130200);a grant from the Institute for Guo Qiang(No.2019GQG1024),Tsinghua University.

摘　　要：Quantum information is vulnerable to environmental noise and experimental imperfections,hindering the reli-ability of practical quantum information processors.Therefore,quantum error correction(QEC)that can pro-tect quantum information against noise is vital for universal and scalable quantum computation.Among many different experimental platforms,superconducting quantum circuits and bosonic encodings in superconducting microwave modes are appealing for their unprecedented potential in QEC.During the last few years,bosonic QEC is demonstrated to reach the break-even point,i.e.the lifetime of a logical qubit is enhanced to exceed that of any individual components composing the experimental system.Beyond that,universal gate sets and fault-tolerant operations on the bosonic codes are also realized,pushing quantum information processing towards the QEC era.In this article,we review the recent progress of the bosonic codes,including the Gottesman-Kitaev-Preskill codes,cat codes,and binomial codes,and discuss the opportunities of bosonic codes in various quantum applications,ranging from fault-tolerant quantum computation to quantum metrology.We also summarize the challenges associated with the bosonic codes and provide an outlook for the potential research directions in the long terms.

关 键 词：Quantum error correction Bosonic codes Superconducting quantum circuits Quantum communication Quantum simulation Quantum metrology 

分 类 号：O413[理学—理论物理]