Universal quantum logic in hot silicon qubits

doi:10.1038/s41586-020-2170-7

GSTDTAP > 地球科学

DOI	10.1038/s41586-020-2170-7
	Universal quantum logic in hot silicon qubits
	Li, Jia 1; Yang, Xiangdong 1; Liu, Yang 2; Huang, Bolong 3; Wu, Ruixia 1; Zhang, Zhengwei 1; Zhao, Bei 1; Ma, Huifang 1; Dang, Weiqi 1; Wei, Zheng 4; Wang, Kai 5; Lin, Zhaoyang 2; Yan, Xingxu 6; Sun, Mingzi 3; Li, Bo 1,7; Pan, Xiaoqing 6,8; Luo, Jun 5; Zhang, Guangyu 4; Liu, Yuan 1,7; Huang, Yu 9; Duan, Xidong 1; Duan, Xiangfeng 2
	2020-03-01
发表期刊	NATURE
ISSN	0028-0836
EISSN	1476-4687
出版年	2020
卷号	580 期号:7803 页码:355-+
文章类型	Article
语种	英语
国家	Netherlands; USA
英文关键词	Quantum computation requires many qubits that can be coherently controlled and coupled to each other(1). Qubits that are defined using lithographic techniques have been suggested to enable the development of scalable quantum systems because they can be implemented using semiconductor fabrication technology(2-5). However, leading solid-state approaches function only at temperatures below 100 millikelvin, where cooling power is extremely limited, and this severely affects the prospects of practical quantum computation. Recent studies of electron spins in silicon have made progress towards a platform that can be operated at higher temperatures by demonstrating long spin lifetimes(6), gate-based spin readout(7) and coherent single-spin control(8). However, a high-temperature two-qubit logic gate has not yet been demonstrated. Here we show that silicon quantum dots can have sufficient thermal robustness to enable the execution of a universal gate set at temperatures greater than one kelvin. We obtain single-qubit control via electron spin resonance and readout using Pauli spin blockade. In addition, we show individual coherent control of two qubits and measure single-qubit fidelities of up to 99.3 per cent. We demonstrate the tunability of the exchange interaction between the two spins from 0.5 to 18 megahertz and use it to execute coherent two-qubit controlled rotations. The demonstration of ' hot' and universal quantum logic in a semiconductor platform paves the way for quantum integrated circuits that host both the quantum hardware and its control circuitry on the same chip, providing a scalable approach towards practical quantum information processing.
领域	地球科学 ; 气候变化 ; 资源环境
收录类别	SCI-E
WOS记录号	WOS:000530151300026
WOS关键词	ELECTRON-SPIN ; NOISE ; GATE
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/281218
专题	地球科学资源环境科学气候变化
作者单位	1.Hunan Univ, Coll Chem & Chem Engn, Hunan Key Lab Two Dimens Mat, State Key Lab Chemobiosensing & Chemometr, Changsha, Peoples R China; 2.Univ Calif Los Angeles, Dept Chem & Biochem, 405 Hilgard Ave, Los Angeles, CA 90024 USA; 3.Hong Kong Polytech Univ, Dept Appl Biol & Chem Technol, Kowloon, Hong Kong, Peoples R China; 4.Chinese Acad Sci, Inst Phys, Beijing Natl Lab Condensed Matter Phys, Beijing, Peoples R China; 5.Tianjin Univ Technol, Inst New Energy, Sch Mat, Ctr Electron Microscopy,Tianjin Key Lab Adv Func, Tianjin, Peoples R China; 6.Univ Calif Irvine, Dept Mat Sci & Engn, Irvine, CA USA; 7.Hunan Univ, Sch Phys & Elect, Changsha, Peoples R China; 8.Univ Calif Irvine, Dept Phys & Astron, Irvine, CA USA; 9.Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90024 USA
推荐引用方式 GB/T 7714	Li, Jia,Yang, Xiangdong,Liu, Yang,et al. Universal quantum logic in hot silicon qubits[J]. NATURE,2020,580(7803):355-+.
APA	Li, Jia.,Yang, Xiangdong.,Liu, Yang.,Huang, Bolong.,Wu, Ruixia.,...&Duan, Xiangfeng.(2020).Universal quantum logic in hot silicon qubits.NATURE,580(7803),355-+.
MLA	Li, Jia,et al."Universal quantum logic in hot silicon qubits".NATURE 580.7803(2020):355-+.