| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2026-02-10 |
| タイトル |
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タイトル |
Highly Sensitive Magnetometer with Continuous Excitation Ramsey Protocol by Utilizing Long Dephasing Time of Millimeter-Scale Spin Ensembles in (111) Diamond |
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言語 |
en |
| 言語 |
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|
言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Ikuya Fujisaki
Zehan Li
Yuji Hatano
Takeharu Sekiguchi
Naota Sekiguchi
Chikara Shinei
Masashi Miyakawa
Takashi Taniguchi
Tokuyuki Teraji
Abe Hiroshi
Onoda Shinobu
Ohshima Takeshi
Takayuki Iwasaki
Mutsuko Hatano
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
We developed a highly sensitive magnetometer with continuous excitation (CE) Ramsey protocol for (111) diamonds. The distinctive feature of the magnetometer is the magnet array and antenna design to realize a uniform bias field and efficient application of quantum manipulation techniques of spin bath driving and double quantum Ramsey in millimeter-scale spin ensembles directed to the surface normal. CE- and pulsed-Ramsey show dephasing times of 16.4 and 20.5 µs, respectively, with an excitation power of 160 mW. Analysis of the compositions of dephasing factors unveils the dephasing channels limiting the dephasing time. Thanks to the long dephasing time, a sensitivity of 15.8 pT/√Hz is achieved in CE-Ramsey. Furthermore, the comparison of sensitivity between CE- and pulsed-Ramsey indicated that the noise induced by laser pulsing exists. This work paves the way for realizing ultra-high sensitivity magnetometers with simple implementation. |
| 書誌情報 |
Advanced Quantum Technologies
巻 8,
号 9,
p. 202500056(1)-202500056(8),
発行日 2025-11
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| 出版者 |
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出版者 |
Wiley |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
2511-9044 |
