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Towards Quantum Networks with Color Centers in Diamond
https://doi.org/10.15102/0002001063
https://doi.org/10.15102/00020010636e7772d3-e72c-4be0-a13f-153e8f7c0cfb
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HamamotoTatsukiFulltext.pdf (40.7 MB)
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HamamotoTatsukiExamAbstract.pdf (64 KB)
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| Item type | デフォルトアイテムタイプ（フル）(1) | |||||||
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| PubDate | 2026-01-08 | |||||||
| Title | ||||||||
| Title | ダイヤモンド色中心を用いた量子ネットワーク実現に向けて | |||||||
| Language | ja | |||||||
| Title | ||||||||
| Title | Towards Quantum Networks with Color Centers in Diamond | |||||||
| Language | en | |||||||
| Creator |
Hamamoto, Tatsuki
× Hamamoto, Tatsuki
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| Access Rights | ||||||||
| Access Rights | open access | |||||||
| Access Rights URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| Rights | ||||||||
| Rights | © 2022 The Authors. | |||||||
| Rights | ||||||||
| Rights Resource | https://creativecommons.org/licenses/by/4.0 | |||||||
| Rights | Creative Commons Attribution 4.0 International | |||||||
| Subject | ||||||||
| Language | en | |||||||
| Subject Scheme | Other | |||||||
| Subject | Quantum information technology | Hybrid Quantum Systems | Spins in Solids | |||||||
| Description | ||||||||
| Description Type | Abstract | |||||||
| Description | Connecting cryogenic solid-state quantum processors with room-temperature optical links is a key step toward a scalable quantum computer. This thesis presents two technological advancements toward the realization of a spin-ensemble-based quantum transducer using impurity spins in diamond. First, a low-loss dielectric microwave resonator based on rutile (TiO2) was developed, achieving an internal quality factor of Qint ∼ 104 despite incorporating large optical apertures. Second, an optical Fabry–Pérot cavity was stabilized at millikelvin temperatures with sub-0.1 nm root-mean-square cavity length fluctuations, enabling stable cavity locking to the laser in a dilution refrigerator. These components were integrated into a hybrid resonator enabling spatial mode overlap within a diamond sample containing an ensemble of nitrogen-vacancy centers. Measurements at 10 mK revealed spin coherence times of T1 = 1930 s and T2 = 470 µs, and characterized the inhomogeneous broadening of the optical transition. We estimate the current microwave-to-optical conversion efficiency and discuss potential improvements through device and cavity optimization. This work establishes a platform for spin ensemble-based transducers operating at millikelvin temperatures. | |||||||
| Language | en | |||||||
| Resource Type | ||||||||
| Resource Type Identifier | http://purl.org/coar/resource_type/c_db06 | |||||||
| Resource Type | doctoral thesis | |||||||
| Version Type | ||||||||
| Version Type | VoR | |||||||
| Version Type Resource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| Identifier Registration | ||||||||
| Identifier Registration | 10.15102/0002001063 | |||||||
| Identifier Registration Type | JaLC | |||||||
| Dissertation Number | ||||||||
| Dissertation Number | 甲第219号 | |||||||
| Degree Name | ||||||||
| Degree Name | Doctor of Philosophy | |||||||
| Date Granted | ||||||||
| Date Granted | 2025-12-31 | |||||||
| Degree Grantor | ||||||||
| Degree Grantor Name Identifier Scheme | kakenhi | |||||||
| Degree Grantor Name Identifier | 38005 | |||||||
| Degree Grantor Name | Okinawa Institute of Science and Technology Graduate University | |||||||
