| 研究課題/領域番号 |
23KF0084
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| 研究種目 |
特別研究員奨励費
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| 配分区分 | 基金 |
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| 応募区分 | 外国 |
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| 審査区分 |
小区分29030:応用物理一般関連
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| 研究機関 | 国立研究開発法人理化学研究所 |
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研究代表者 |
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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| 研究分担者 |
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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| 研究期間 (年度) |
2023-04-25 – 2025-03-31
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| 研究課題ステータス |
交付 (2023年度)
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| 配分額 *注記 |
2,000千円 (直接経費: 2,000千円)
2024年度: 1,000千円 (直接経費: 1,000千円)
2023年度: 1,000千円 (直接経費: 1,000千円)
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| キーワード | Quantum computing / Superconducting qubits / Quantum measurement / High fidelity / Circuit QED |
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| 研究開始時の研究の概要 |
In analogy to the bits in modern computers, 'qubits' are the fundamental building block of quantum computers. In this research, we look for ways to improve the measurement of qubits made from superconducting circuits. This contributes to the development of more powerful quantum technologies that can benefit society.
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| 研究実績の概要 |
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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| 現在までの達成度 (区分) |
現在までの達成度 (区分)
1: 当初の計画以上に進展している
理由
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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| 今後の研究の推進方策 |
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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