Experimental Implementation of Efficient Quantum Pseudorandomness on a 12-Spin System

Li, Jun1,2,3,4,5; Luo, Zhihuang1,2,3,6; Xin, Tao1,2,3,5; Wang, Hengyan7; Kribs, David4,8; Lu, Dawei1,2,3,5; Zeng, Bei3,4,8; Laflamme, Raymond4,9

2019-07-15

10.1103/PhysRevLett.123.030502

PHYSICAL REVIEW LETTERS   影响因子和分区

0031-9007

1079-7114

Quantum pseudorandomness, also known as unitary designs, comprises a powerful resource for emergent quantum technologies. Although in theory pseudorandom unitary operators can be constructed efficiently, realizing these objects in realistic physical systems is a challenging task. Here, we demonstrate experimental generation and detection of quantum pseudorandomness on a 12-qubit nuclear magnetic resonance system. We first apply random sequences to the interacting nuclear spins, leading to random quantum evolutions that can quickly form unitary designs. Then, in order to probe the growth of quantum pseudorandomness during the time evolutions, we propose the idea of using the system's multiple-quantum coherence distribution as an indicator. Based on this indicator, we measure the spreading of quantum coherences and find that substantial quantum pseudorandomness has been achieved at the 12-qubit scale. This may open up a path to experimentally explore quantum randomness on forthcoming large-scale quantum processors.

SCI ; EI

英语

第一 ; 通讯

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06D348]

Physics

Physics, Multidisciplinary

WOS:000475510900002

AMER PHYSICAL SOC

20193107258646

Quantum theory ; Random processes

Probability Theory:922.1 ; Quantum Theory; Quantum Mechanics:931.4

PHYSICS

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
3.Ctr Quantum Comp, Peng Cheng Lab, Shenzhen 518055, Peoples R China
4.Univ Waterloo, Inst Quantum Comp, Waterloo, ON N2L 3G1, Canada
5.Shenzhen Key Lab Quantum Sci & Engn, Shenzhen 518055, Peoples R China
6.Sun Yat Sen Univ, Sch Phys & Astron, Lab Quantum Engn & Quantum Metrol, Zhuhai Campus, Zhuhai 519082, Peoples R China
7.Zhejiang Univ Sci & Technol, Dept Phys, Hangzhou 310023, Zhejiang, Peoples R China
8.Univ Guelph, Dept Math & Stat, Guelph, ON N1G 2W1, Canada
9.Perimeter Inst Theoret Phys, Waterloo, ON N2L 2Y5, Canada

Li, Jun,Luo, Zhihuang,Xin, Tao,et al. Experimental Implementation of Efficient Quantum Pseudorandomness on a 12-Spin System[J]. PHYSICAL REVIEW LETTERS,2019,123(3).

Li, Jun.,Luo, Zhihuang.,Xin, Tao.,Wang, Hengyan.,Kribs, David.,...&Laflamme, Raymond.(2019).Experimental Implementation of Efficient Quantum Pseudorandomness on a 12-Spin System.PHYSICAL REVIEW LETTERS,123(3).

Li, Jun,et al."Experimental Implementation of Efficient Quantum Pseudorandomness on a 12-Spin System".PHYSICAL REVIEW LETTERS 123.3(2019).