Native Conditional iSWAP Operation with Superconducting Artificial Atoms

Hu, Chang-Kang1,2,3; Yuan, Jiahao1,2,3,4; Veloso, Bruno A.5; Qiu, Jiawei1,2,3,4; Zhou, Yuxuan1,2,3,4; Zhang, Libo1,2,3; Chu, Ji1,2,3; Nurbolat, Orkesh1,2,3; Hu, Ling1,2,3; Li, Jian1,2,3; Xu, Yuan1,2,3; Zhong, Youpeng1,2,3; Liu, Song1,2,3; Yan, Fei1,2,3,8; Tan, Dian1,2,3; Bachelard, R.5,6; Santos, Alan C.5,7; Villas-Boas, C. J.5; Yu, Dapeng1,2,3,4

2023-09-29

10.1103/PhysRevApplied.20.034072

PHYSICAL REVIEW APPLIED   Impact Factor & Quartile

2331-7019

Controlling the flow of quantum information is a fundamental task for quantum computers, which is unfeasible to realize on classical devices. Coherent devices, which can process quantum states are thus required to route the quantum states that encode information. In this paper we demonstrate experimentally the smallest quantum transistor with a superconducting quantum processor, which is composed of a collector qubit, an emitter qubit, and a coupler (transistor gate). The interaction strength between the collector and emitter qubits is controlled by the frequency and state of the coupler, effectively implementing a quantum switch. Through the coupler-state-dependent Heisenberg (inherent) interaction between the qubits, a single-step (native) conditional iSWAP operation can be applied. To this end, we find that it is useful to take into consideration the higher-energy level for achieving a native and high-fidelity transistor operation. By reconstructing the quantum process tomography, we obtain an operation fidelity of 92.36% when the transistor gate is open (iSWAP implementation) and 95.23% in the case of closed gate (identity gate implementation). The architecture has strong potential in quantum information processing applications with superconducting qubits.

SCI

English

First ; Corresponding

Guangdong Innovative and Entrepreneurial Research Team Program[2018B030326001] ; Guangdong Provincial Key Laboratory["12205137","12004167","11934010","1801661"] ; Natural Science Foundation of Guangdong Province["2020M671861","2021T140648"] ; Science, Technology and Innovation Commission of Shenzhen Municipality[2016ZT06D348] ; NSF of Beijing[2019B121203002] ; So Paulo Research Foundation (FAPESP)[2017B030308003] ; Coordenaco de Aperfeicoamento de Pessoal de Nivel Superior (CAPES/STINT)["JCYJ20170412152620376","KYT-DPT20181011104202253"] ; National Council for Scientific and Technological Development (CNPq)[Z190012] ; Brazilian National Institute of Science and Technology for Quantum Information (INCTIQ/CNPq)["2018/15554-5","2019/22685-1","2019/11999-5","2019/13143-0","2021/10224-0"] ; null[88881.304807/2018-01] ; null[88887.512104/2020-00] ; null[302981/2017-9] ; null[409946/2018-4] ; null[311612/2021-0] ; null[465469/2014-0]

Physics

Physics, Applied

WOS:001088947000001

AMER PHYSICAL SOC

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Int Quantum Acad, Shenzhen 518048, Guangdong, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Quantum Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
5.Univ Fed Sao Carlos, Dept Fis, Rodovia Washington Luis, km 235-SP-310, BR-13565905 Sao Carlos, SP, Brazil
6.Univ Cote Azur, Inst Phys Nice, CNRS, F-06560 Valbonne, France
7.Stockholm Univ, Albanova Univ Ctr, Dept Phys, SE-106 91 Stockholm, Sweden
8.Beijing Acad Quantum Informat Sci, Beijing 100193, Peoples R China

Hu, Chang-Kang,Yuan, Jiahao,Veloso, Bruno A.,et al. Native Conditional iSWAP Operation with Superconducting Artificial Atoms[J]. PHYSICAL REVIEW APPLIED,2023,20(3).

Hu, Chang-Kang.,Yuan, Jiahao.,Veloso, Bruno A..,Qiu, Jiawei.,Zhou, Yuxuan.,...&Yu, Dapeng.(2023).Native Conditional iSWAP Operation with Superconducting Artificial Atoms.PHYSICAL REVIEW APPLIED,20(3).

Hu, Chang-Kang,et al."Native Conditional iSWAP Operation with Superconducting Artificial Atoms".PHYSICAL REVIEW APPLIED 20.3(2023).