Fast and perfect state transfer in superconducting circuit with tunable coupler

doi:10.1088/1674-1056/acf496

中国物理B ›› 2023, Vol. 32 ›› Issue (11): 110305-110305.doi: 10.1088/1674-1056/acf496

Fast and perfect state transfer in superconducting circuit with tunable coupler

Chi Zhang(张驰)^1,2,†, Tian-Le Wang(王天乐)^1,2,†, Ze-An Zhao(赵泽安)^1,2, Xiao-Yan Yang(杨小燕)^1,2, Liang-Liang Guo(郭亮亮)^1,2, Zhi-Long Jia(贾志龙)^1,2, Peng Duan(段鹏)^1,2, and Guo-Ping Guo(郭国平)^1,2,3,‡

1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2 CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
3 Origin Quantum Computing Company Limited, Hefei 230026, China

收稿日期:2023-08-01 修回日期:2023-08-23 接受日期:2023-08-29 出版日期:2023-10-16 发布日期:2023-10-26
通讯作者: Guo-Ping Guo E-mail:gpguo@ustc.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12034018 and 11625419). This work is partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication.

Fast and perfect state transfer in superconducting circuit with tunable coupler

1 CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei 230026, China;
2 CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;
3 Origin Quantum Computing Company Limited, Hefei 230026, China

Received:2023-08-01 Revised:2023-08-23 Accepted:2023-08-29 Online:2023-10-16 Published:2023-10-26
Contact: Guo-Ping Guo E-mail:gpguo@ustc.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 12034018 and 11625419). This work is partially carried out at the USTC Center for Micro and Nanoscale Research and Fabrication.

摘要/Abstract

摘要： In quantum computation and quantum information processing, the manipulation and engineering of quantum systems to suit certain purposes are an ongoing task. One such example is quantum state transfer (QST), an essential requirement for both quantum communication and large-scale quantum computation. Here we engineer a chain of four superconducting qubits with tunable couplers to realize the perfect state transfer (PST) protocol originally proposed in quantum spin networks and successfully demonstrate the efficient transfer of an arbitrary single-qubit state from one end of the chain to the other, achieving a high fidelity of 0.986 in just 25 ns. This demonstrated QST is readily to extend to larger chain and multi-node configurations, thus serving as a desirable tool for scalable quantum information processing.

关键词: quantum state transfer, superconducting circuit, tunable coupler

Abstract: In quantum computation and quantum information processing, the manipulation and engineering of quantum systems to suit certain purposes are an ongoing task. One such example is quantum state transfer (QST), an essential requirement for both quantum communication and large-scale quantum computation. Here we engineer a chain of four superconducting qubits with tunable couplers to realize the perfect state transfer (PST) protocol originally proposed in quantum spin networks and successfully demonstrate the efficient transfer of an arbitrary single-qubit state from one end of the chain to the other, achieving a high fidelity of 0.986 in just 25 ns. This demonstrated QST is readily to extend to larger chain and multi-node configurations, thus serving as a desirable tool for scalable quantum information processing.

Key words: quantum state transfer, superconducting circuit, tunable coupler

中图分类号: (Quantum information)

03.67.-a

03.67.Ac (Quantum algorithms, protocols, and simulations)

Chi Zhang(张驰), Tian-Le Wang(王天乐), Ze-An Zhao(赵泽安), Xiao-Yan Yang(杨小燕), Liang-Liang Guo(郭亮亮), Zhi-Long Jia(贾志龙), Peng Duan(段鹏), and Guo-Ping Guo(郭国平). Fast and perfect state transfer in superconducting circuit with tunable coupler[J]. 中国物理B, 2023, 32(11): 110305-110305.

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Fast and perfect state transfer in superconducting circuit with tunable coupler

Fast and perfect state transfer in superconducting circuit with tunable coupler

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