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Solid-state electron spin lifetime limited by phononic vacuum modes
https://repo.qst.go.jp/records/48746
https://repo.qst.go.jp/records/48746d0ac9963-37db-4a14-9de2-50b6416b13e8
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-04-19 | |||||
| タイトル | ||||||
| タイトル | Solid-state electron spin lifetime limited by phononic vacuum modes | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Astner, Thomas
× Astner, Thomas× Gugler, Johannes× Angerer, Andreas× Wald, Sebastian× Putz, Stefan× J., Mauser Norbert× Trupke, Michael× Sumiya, Hitoshi× Onoda, Shinobu× Isoya, Junichi× Schmiedmayer, Jörg× Mohn, Peter× Majer, Johannes× 小野田 忍 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Longitudinal relaxation is the process by which an excited spin ensemble decays into its thermal equilibrium with the environment. In solid-state spin systems relaxation into the phonon bath usually dominates over the coupling to the electromagnetic vacuum. In the quantum limit the spin lifetime is determined by phononic vacuum fluctuations. However, this limit was not observed in previous studies due to thermal phonon contributions or phonon-bottleneck processes. Here we use a dispersive detection scheme based on cavity quantum electrodynamics (cQED) to observe this quantum limit of spin relaxation of the negatively charged nitrogen vacancy (NV−) centre in diamond. Diamond possesses high thermal conductivity even at low temperatures, which eliminates phonon-bottleneck processes. We observe exceptionally long longitudinal relaxation times T1 of up to 8h. To understand the fundamental mechanism of spin-phonon coupling in this system we develop a theoretical model and calculate the relaxation time ab initio. The calculations confirm that the low phononic density of states at the NV− transition frequency enables the spin polarization to survive over macroscopic timescales. | |||||
| 書誌情報 |
Nature Materials 巻 17, p. 313-317, 発行日 2018-02 |
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| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1038/s41563-017-0008-y | |||||
