Genuine 12-Qubit Entanglement on a Superconducting Quantum Processor

被引：155

作者：

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

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

Zheng, Yarui ^{[1
,2
,3
]}

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

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

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

Yan, Zhiguang ^{[1
,2
,3
]}

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

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

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

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

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

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

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

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

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

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

Castellano, Anthony D. ^{[1
,2
,3
]}

Wang, Haohua ^{[4
]}

Peng, Chengzhi ^{[1
,2
,3
]}

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

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

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

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 Modern Phys, Hefei 230026, Anhui, Peoples R China

[3] 10 Univ Sci & Technol China, Shanghai Branch, CAS Ctr Excellence & Synerget Innovat, Ctr Quantum Informat & Quantum Phys, Shanghai, Peoples R China

[4] Zhejiang Univ, Dept Phys, Hangzhou 310027, Zhejiang, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 122卷 / 11期

关键词：

Qubits;

D O I：

10.1103/PhysRevLett.122.110501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the preparation and verification of a genuine 12-qubit entanglement in a superconducting processor. The processor that we designed and fabricated has qubits lying on a 1D chain with relaxation times ranging from 29.6 to 54.6 mu s. The fidelity of the 12-qubit entanglement was measured to be above 0.5544 +/- 0.0025, exceeding the genuine multipartite entanglement threshold by 21 statistical standard deviations. After thermal cycling, the 12-qubit state fidelity was further improved to be above 0.707 +/- 0.008. Our entangling circuit to generate linear cluster states is depth invariant in the number of qubits and uses single- and double-qubit gates instead of collective interactions. Our results are a substantial step towards large-scale random circuit sampling and scalable measurement-based quantum computing.

引用

页数：5

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