2023 Fiscal Year Annual Research Report
Detection of quantum states of single electrons on liquid helium
| Project/Area Number |
20K15118
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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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| Keywords | electrons on helium / Cryogenic amplifier / quantum state readout / EoH / Rydberg States |
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| Outline of Annual Research Achievements |
Throughout the research period, our project on detecting quantum states of single electrons on liquid helium has achieved significant outcomes despite challenges. Initially, we refined experimental parameters for detecting single electrons in liquid helium (EoLH). Using our image-charge detection method, we studied the excitation and relaxation dynamics of the quantum Rydberg states of EoLH. Developing a two-stage cryogenic amplification technique enabled us to detect image-charge within a 10 MHz bandwidth, advancing real-time observation of electron dynamics. These insights led to crucial conclusions regarding electron excitation and relaxation timescales.
However, research progress was delayed due to the Principal Investigator's (PI) transition to a new role with more responsibilities, limiting time for the project. The COVID-19 pandemic further impacted facility availability and collaboration, and the relocation of our measurement lab required adapting to a different cryogenic system.
Despite these delays, we published key findings in reputable journals, including the introduction of cryogenic amplification of image-charge detection and the relaxation dynamics of Rydberg states. These contributions have advanced the understanding of the electrons' behaviors and dynamics in quantum states.
In conclusion, while we faced delays, the significant advancements achieved have established a good foundation for future research. The techniques developed during this project will continue to drive progress in understanding and manipulating quantum states of electrons on liquid helium.
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