2023 Fiscal Year Research-status Report
Implementing Strategies for Minimizing Errors in Superconducting Circuits for Quantum Computation
| Project/Area Number |
23KF0084
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| Research Institution | Institute of Physical and Chemical Research |
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Principal Investigator |
中村 泰信 国立研究開発法人理化学研究所, 量子コンピュータ研究センター, センター長 (90524083)
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| Co-Investigator(Kenkyū-buntansha) |
SPRING PETER 国立研究開発法人理化学研究所, 量子コンピュータ研究センター, 外国人特別研究員
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| Project Period (FY) |
2023-04-25 – 2025-03-31
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| Keywords | Quantum computing / Superconducting qubits / Quantum measurement / High fidelity / Circuit QED |
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| Outline of Annual Research Achievements |
Our research has focused on advancing fast, high-fidelity readout in superconducting quantum computers. Achievements include designing and patenting a novel ‘Purcell’ filter, integrating the design into the superconducting circuit architecture being pursued at RIKEN, and demonstrating state-of-the-art high-fidelity readout surpassing previous benchmarks. Our readout results pave the way for effective implementation of quantum error correction in the superconducting circuits under development at RIKEN.
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| Current Status of Research Progress |
Current Status of Research Progress
1: Research has progressed more than it was originally planned.
Reason
At the current stage, I have designed and measured a device that sets a new record for performing accurate readout using superconducting qubits. Myself and the coauthors are writing a manuscript about this device which we plan to submit to an APS journal such as Physical Review Applied. The device features a new design of ‘Purcel filter’ that protects the qubit from losing its energy through the measurement line. We have filed a patent application for this design. I have also developed theoretical results along with coauthor Shuhei Tamate on the behavior of periodic quantum circuits at large-scale. We aim to prepare a manuscript on these results.
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| Strategy for Future Research Activity |
The current plan is as follows:
-Finish measuring the current device and demonstrate state-of-the-art readout performance. Submit a manuscript based on these measurements.
-Write a separate manuscript based on modelling the behavior of periodic quantum circuits at large-scale.
-Contribute to a collaboration with University of Oxford researchers on improved superconducting qubit readout state discrimination using a novel machine-learning approach.
I anticipate it will be possible to compete this plan before the end of the JSPS fellowship on 21st November 2024.
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| Causes of Carryover |
計画通りに予算を執行したが、2円の端数が生じたので次年度に使用を予定している。
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[Presentation] QuBE: a Qubit-controller with Broadband Electronics2024
Author(s)
T. Sumida, M. Negoro, K. Ogawa, T. Miyoshi, H. Shiomi, S. Morisaka, R. Matsuda, K. Koike, S. Funada, R. Ohira, Y. Kurimoto, Y. Sugita, Y. Ito, Y. Suzuki, P. A. Spring, S. Wang, S. Tamate, Y. Tabuchi, and Y. Nakamura
Organizer
APS March meeting 2024
Int'l Joint Research
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[Presentation] Experimental demonstrations of broadband quantum control ofsuperconducting qubits with QuBE (Qubit-controller withBroadband Electronics)2024
Author(s)
M. Negoro, K. Ogawa, T. Miyoshi, H. Shiomi, S. Morisaka, R. Matsuda, K. Koike, S. Funada, R. Ohira, T. Sumida, Y. Kurimoto, Y. Sugita, Y. Ito, Y. Suzuki, P. A. Spring, S. Wang, S. Tamate, Y. Tabuchi, and Y. Nakamura
Organizer
APS March meeting 2024
Int'l Joint Research
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[Presentation] ロバスト最適化された動的デカップリングの超伝導量子ビットでの実装2023
Author(s)
町野明徳, 小川和久, 御手洗光祐, 三好健文, 塩見英久, 森榮真一, 松田亮, 小池恵介, 大平龍太郎, 隅田土詞, 栗本佳典, 杉田祐也, 伊藤陽介, 鈴木泰成, Peter A. Spring, Shiyu Wang, 玉手修平, 田渕豊, 中村泰信, 根来誠
Organizer
第49回量子情報技術研究会 (QIT49)
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