Quantum walks on a programmable two-dimensional 62-qubit superconducting processor

被引：244

作者：

Gong, Ming ^{[1
,2
,3
,4
]}

Wang, Shiyu ^{[1
,2
,3
,4
]}

Zha, Chen ^{[1
,2
,3
,4
]}

Chen, Ming-Cheng ^{[1
,2
,3
,4
]}

Huang, He-Liang ^{[1
,2
,3
,4
]}

Wu, Yulin ^{[1
,2
,3
,4
]}

Zhu, Qingling ^{[1
,2
,3
,4
]}

Zhao, Youwei ^{[1
,2
,3
,4
]}

Li, Shaowei ^{[1
,2
,3
,4
]}

Guo, Shaojun ^{[1
,2
,3
,4
]}

Qian, Haoran ^{[1
,2
,3
,4
]}

Ye, Yangsen ^{[1
,2
,3
,4
]}

Chen, Fusheng ^{[1
,2
,3
,4
]}

Ying, Chong ^{[1
,2
,3
,4
]}

Yu, Jiale ^{[1
,2
,3
,4
]}

Fan, Daojin ^{[1
,2
,3
,4
]}

Wu, Dachao ^{[1
,2
,3
,4
]}

Su, Hong ^{[1
,2
,3
,4
]}

Deng, Hui ^{[1
,2
,3
,4
]}

Rong, Hao ^{[1
,2
,3
,4
]}

Zhang, Kaili ^{[1
,2
,3
,4
]}

Cao, Sirui ^{[1
,2
,3
,4
]}

Lin, Jin ^{[1
,2
,3
,4
]}

Xu, Yu ^{[1
,2
,3
,4
]}

Sun, Lihua ^{[1
,2
,3
,4
]}

Guo, Cheng ^{[1
,2
,3
,4
]}

Li, Na ^{[1
,2
,3
,4
]}

Liang, Futian ^{[1
,2
,3
,4
]}

Bastidas, V. M. ^{[5
]}

Nemoto, Kae ^{[6
]}

Munro, W. J. ^{[5
,6
]}

Huo, Yong-Heng ^{[1
,2
,3
,4
]}

Lu, Chao-Yang ^{[1
,2
,3
,4
]}

Peng, Cheng-Zhi ^{[1
,2
,3
,4
]}

Zhu, Xiaobo ^{[1
,2
,3
,4
]}

Pan, Jian-Wei ^{[1
,2
,3
,4
]}

机构：

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

[2] Univ Sci & Technol China, Dept Modem Phys, Hefei 230026, Anhui, Peoples R China

[3] Univ Sci & Technol China, CAS Ctr Excellence Quantum Informat & Quantum Phy, Shanghai Branch, Shanghai 201315, Peoples R China

[4] Shanghai Res Ctr Quantum Sci, Shanghai 201315, Peoples R China

[5] NTT Basic Res Labs & Res Ctr Theoret Quantum Phys, 3-1 Morinosato Wakamiya, Atsugi, Kanagawa 2430198, Japan

[6] Natl Inst Informat, Chiyoda Ku, 2-1-2 Hitotsubashi, Tokyo 1018430, Japan

来源：

SCIENCE | 2021年 / 372卷 / 6545期

基金：

国家重点研发计划; 上海市自然科学基金; 美国国家科学基金会;

关键词：

D O I：

10.1126/science.abg7812

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Quantum walks are the quantum mechanical analog of classical random walks and an extremely powerful tool in quantum simulations, quantum search algorithms, and even for universal quantum computing. In our work, we have designed and fabricated an 8-by-8 two-dimensional square superconducting qubit array composed of 62 functional qubits. We used this device to demonstrate high-fidelity single- and two-particle quantum walks. Furthermore, with the high programmability of the quantum processor, we implemented a Mach-Zehnder interferometer where the quantum walker coherently traverses in two paths before interfering and exiting. By tuning the disorders on the evolution paths, we observed interference fringes with single and double walkers. Our work is a milestone in the field, bringing future larger-scale quantum applications closer to realization for noisy intermediate-scale quantum processors.

引用

页码：948 / +

页数：28

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