| Project/Area Number |
19K05316
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Review Section |
Basic Section 30020:Optical engineering and photon science-related
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| Research Institution | Okinawa Institute of Science and Technology Graduate University |
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Principal Investigator |
Nic Chormaic Sile 沖縄科学技術大学院大学, 量子技術のための光・物質相互作用ユニット, 教授 (10715288)
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| Project Period (FY) |
2019-04-01 – 2023-03-31
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| Project Status |
Completed (Fiscal Year 2022)
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| Budget Amount *help |
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | Rydberg / optical nanofiber / quantum network / Casimir-Polder / dielectric / cold atoms / ionization / Rydberg atom / Rubidium / quadrupole transitions / quantum networks / Rydberg blockade / Angular momentum / Rydberg atoms / Optical Nanofiber / Quantum / Network / Atomic Physics / optical nanofibre / evanescent field / spin selection / dipole trap / atom / spontaneous emission / two-photon / nanofiber / van der Waals |
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| Outline of Research at the Start |
Rydberg atom formation next to optical nanofibres, and the effect of the dielectric surface on the Rydberg blockade phenomenon, will be investigated, with quantum gate implementation as an ultimate goal. Starting from a cloud of laser-cooled 87Rb atoms (at 20 microK), a two-colour fibre-based dipole trap will be obtained so that the atoms are at a controlled distance of about 200 nm from the fibre surface. On release from the dipole trap, a Rydberg excitation pulse will be implemented for different excitation levels from n = 16 ~ 70.
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| Outline of Final Research Achievements |
The research has shown it is possible to create Rydberg atoms next to an optical nanofibre. We have achieved excitation as high as n=68 for D states. We can extend this to higher states by controlling the position of the ground state atoms prior to the excitation pulse to the Rydberg state. This opens up many new avenues of research, particularly in the area of waveguide quantum electrodynamics, contributing to advances in quantum optics and possibly the development of Rydberg atom-waveguide quantum networks. Our work has successfully been recognized by the international community and has led several other laboratories worldwide to commence experimental endeavors on Rydberg atoms and optical nanofibres. We have published several peer-reviewed articles related to the experimental and theoretical outcomes and have given a number of invited talks at conferences in many countries including the USA, Spain, Germany, United Kingdom, and Japan on the outcomes.
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| Academic Significance and Societal Importance of the Research Achievements |
In quantum technologies, atoms are ideal for storing quantum informatio, acting as quantum nodes and photons transfer this information, creating a quantum “bus” for data. A loss of photons can occur during the transfer. This can be surmounted by using optical nanofibres in the atom system.
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