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In Situ Thermometry of a Cold Fermi Gas via Dephasing Impurities
https://oist.repo.nii.ac.jp/records/1799
https://oist.repo.nii.ac.jp/records/1799bd03ba28-f40b-43bd-a942-423cedea9ad2
名前 / ファイル | ライセンス | アクション |
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Mitchison-2020-In Situ Thermometry of a Cold F (743.1 kB)
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Creative Commons Attribution 4.0 International(https://creativecommons.org/licenses/by/4.0/)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2020-11-17 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | In Situ Thermometry of a Cold Fermi Gas via Dephasing Impurities | |||||
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 | |||||
著者(英) |
Mitchison, Mark T.
× Mitchison, Mark T.× Fogarty, Thomás× Guarnieri, Giacomo× Campbell, Steve× Busch, Thomas× Goold, John |
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書誌情報 |
en : Physical Review Letters 巻 125, 号 8, p. 080402, 発行日 2020-08-19 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | The precise measurement of low temperatures is a challenging, important, and fundamental task for quantum science. In particular, in situ thermometry is highly desirable for cold atomic systems due to their potential for quantum simulation. Here, we demonstrate that the temperature of a noninteracting Fermi gas can be accurately inferred from the nonequilibrium dynamics of impurities immersed within it, using an interferometric protocol and established experimental methods. Adopting tools from the theory of quantum parameter estimation, we show that our proposed scheme achieves optimal precision in the relevant temperature regime for degenerate Fermi gases in current experiments. We also discover an intriguing trade-off between measurement time and thermometric precision that is controlled by the impurity-gas coupling, with weak coupling leading to the greatest sensitivities. This is explained as a consequence of the slow decoherence associated with the onset of the Anderson orthogonality catastrophe, which dominates the gas dynamics following its local interaction with the immersed impurity. | |||||
出版者 | ||||||
出版者 | American Physical Society | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0031-9007 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1079-7114 | |||||
PubMed番号 | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | PMID | |||||
関連識別子 | info:pmid/32909771 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1103/PhysRevLett.125.080402 | |||||
権利 | ||||||
権利情報 | © 2020 American Physical Society. | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.125.080402 | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 |