Experimental Simulation of Larger Quantum Circuits with Fewer Superconducting Qubits

Ying, Chong1,2,3,4,5; Cheng, Bin6,7,8; Zhao, Youwei1,2,3,4,5; Huang, He-Liang1,2,3,4,5,9; Zhang, Yu-Ning7,8,10; Gong, Ming1,2,3,4,5; Wu, Yulin1,2,3,4,5; Wang, Shiyu1,2,3,4,5; Liang, Futian4; Lin, Jin1,2,3,4,5; Xu, Yu1,2,3,4,5; Deng, Hui1,2,3,4,5; Rong, Hao1,2,3,4,5; Peng, Cheng-Zhi1,2,3,4,5; Yung, Man -Hong7,8,11,12; Zhu, Xiaobo1,2,3,4,5; Pan, Jian-Wei1,2,3,4,5

2023-03-17

10.1103/PhysRevLett.130.110601

PHYSICAL REVIEW LETTERS   Impact Factor & Quartile

0031-9007

1079-7114

Although near-term quantum computing devices are still limited by the quantity and quality of qubits in the so-called NISQ era, quantum computational advantage has been experimentally demonstrated. Moreover, hybrid architectures of quantum and classical computing have become the main paradigm for exhibiting NISQ applications, where low-depth quantum circuits are repeatedly applied. In order to further scale up the problem size solvable by the NISQ devices, it is also possible to reduce the number of physical qubits by "cutting" the quantum circuit into different pieces. In this work, we experimentally demonstrated a circuit-cutting method for simulating quantum circuits involving many logical qubits, using only a few physical superconducting qubits. By exploiting the symmetry of linear-cluster states, we can estimate the effectiveness of circuit-cutting for simulating up to 33-qubit linear-cluster states, using at most 4 physical qubits for each subcircuit. Specifically, for the 12-qubit linear-cluster state, we found that the experimental fidelity bound can reach as much as 0.734, which is about 19% higher than a direct implementation on the same 12-qubit superconducting processor. Our results indicate that circuit-cutting represents a feasible approach of simulating quantum circuits using much fewer qubits, while achieving a much higher circuit fidelity.

SCI

English

Corresponding

Economy, Trade and Information Commission of Shenzhen Municipality[2021ZD0300200] ; Guangdong Provincial Key Laboratory[11574380] ; Youth Talent Lifting Project[XDB28000000] ; China Postdoctoral Science Foundation[2019SHZDZX01] ; null[11875160] ; null[U1801661] ; null[11905294] ; null[12274464] ; null[2017B030308003] ; null[JCYJ20170412152620376] ; null[JCYJ20170817105046702] ; null[KYTDPT20181011104202253] ; null[2018B030326001] ; null[201901161512] ; null[2019B121203002] ; null[2020-JCJQ-QT-030] ; null[201901-01] ; null[2022460]

Physics

Physics, Multidisciplinary

WOS:000954803100001

AMER PHYSICAL SOC

PHYSICS

Web of Science

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Ying, Chong,Cheng, Bin,Zhao, Youwei,et al. Experimental Simulation of Larger Quantum Circuits with Fewer Superconducting Qubits[J]. PHYSICAL REVIEW LETTERS,2023,130(11).

Ying, Chong.,Cheng, Bin.,Zhao, Youwei.,Huang, He-Liang.,Zhang, Yu-Ning.,...&Pan, Jian-Wei.(2023).Experimental Simulation of Larger Quantum Circuits with Fewer Superconducting Qubits.PHYSICAL REVIEW LETTERS,130(11).

Ying, Chong,et al."Experimental Simulation of Larger Quantum Circuits with Fewer Superconducting Qubits".PHYSICAL REVIEW LETTERS 130.11(2023).