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Understanding and Improving Critical Metrology. Quenching Superradiant Light-Matter Systems Beyond the Critical Point
https://oist.repo.nii.ac.jp/records/2687
https://oist.repo.nii.ac.jp/records/26877e88a345-408a-4480-ae5c-cab49c3f22d1
名前 / ファイル | ライセンス | アクション |
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q-2022-04-27-700_2 (4.8 MB)
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CC BY 4.0
Creative Commons Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/) |
Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-07-06 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Understanding and Improving Critical Metrology. Quenching Superradiant Light-Matter Systems Beyond the Critical Point | |||||
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) |
Gietka, Karol
× Gietka, Karol× Ruks, Lewis× Busch, Thomas |
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書誌情報 |
en : Quantum 巻 6, p. 700, 発行日 2022-04-27 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | We carefully examine critical metrology and present an improved critical quantum metrology protocol which relies on quenching a system exhibiting a superradiant quantum phase transition beyond its critical point. We show that this approach can lead to an exponential increase of the quantum Fisher information in time with respect to existing critical quantum metrology protocols relying on quenching close to the critical point and observing power law behaviour. We demonstrate that the Cramér-Rao bound can be saturated in our protocol through the standard homodyne detection scheme. We explicitly show its advantage using the archetypal setting of the Dicke model and explore a quantum gas coupled to a single-mode cavity field as a potential platform. In this case an additional exponential enhancement of the quantum Fisher information can in practice be observed with the number of atoms N in the cavity, even in the absence of N-body coupling terms. | |||||
出版者 | ||||||
出版者 | Verein zur Förderung des Open Access Publizierens in den Quantenwissenschaften | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2521-327X | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.22331/q-2022-04-27-700 | |||||
権利 | ||||||
権利情報 | © 2022 The Author(s) | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://quantum-journal.org/papers/q-2022-04-27-700/ | |||||
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 |