| Project/Area Number |
20K15118
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 28020:Nanostructural physics-related
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
Elarabi Asem 沖縄科学技術大学院大学, エンジニアリングセクション, 電子機器研究支援チームリーダー (70866748)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Project Status |
Completed (Fiscal Year 2023)
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| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥130,000 (Direct Cost: ¥100,000、Indirect Cost: ¥30,000)
Fiscal Year 2020: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
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| Keywords | Cryogenic amplifer / Electrons on Helium / Qubits readout / Cryogenic electronics / electrons on helium / Cryogenic amplifier / quantum state readout / EoH / Rydberg States / signle electronics / single-electrons / Quantum computer / Qubit / Single-electron |
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| Outline of Research at the Start |
Readout of quantum states in qubits is a benchmark problem in quantum computation. Suspended electrons on liquid helium (EoLH) can give access to an unparalleled noise-free environment for qubits with the highest electron mobility recorded and good scalability. Nevertheless, to date, the development of qubits based on EoLH has been limited by the detection of the quantum states of single-electrons. The aim is to employ device of high sensitivity (rf-SET), and Micro-resonators to detect and manipulate quantum states of single-electrons by using advanced nanofabrication techniques.
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| Outline of Final Research Achievements |
Our project successfully developed a two-stage cryogenic amplification scheme, significantly enhancing the sensitivity and bandwidth of quantum state detection for electrons on liquid helium. This method achieved a constant gain of 40 dB over a frequency range of 100 kHz to 100 MHz, enabling the accurate detection of Rydberg states.
This advancement addresses critical challenges in quantum computing, paving the way for more efficient and densely packed qubit arrays. Additionally, the improved detection methods have broader applications in fields requiring high-sensitivity measurements at low temperatures, such as astrophysics and material science. The project's findings contribute significantly to the development of scalable quantum computers and other advanced technologies.
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| Academic Significance and Societal Importance of the Research Achievements |
This research enhances quantum states detection, crucial for scalable quantum computing, addressing major scientific challenges. It also benefits fields requiring high-sensitivity low-temperature measurements, such as astrophysics and materials science, driving scientific and technological progress.
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