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Uncertainty limits for quantum metrology obtained from the statistics of weak measurements
https://hiroshima.repo.nii.ac.jp/records/2008046
https://hiroshima.repo.nii.ac.jp/records/2008046285e54af-fedf-4637-b101-3b319b5d5a3b
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
PhysRevA_83_022106.pdf (79.6 KB)
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| Item type | デフォルトアイテムタイプ_（フル）(1) | |||||||
|---|---|---|---|---|---|---|---|---|
| 公開日 | 2023-03-18 | |||||||
| タイトル | ||||||||
| タイトル | Uncertainty limits for quantum metrology obtained from the statistics of weak measurements | |||||||
| 言語 | en | |||||||
| 作成者 |
Hofmann, Holger F
× Hofmann, Holger F
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| アクセス権 | ||||||||
| アクセス権 | open access | |||||||
| アクセス権URI | http://purl.org/coar/access_right/c_abf2 | |||||||
| 権利情報 | ||||||||
| 権利情報 | Copyright (c) 2011 American Physical Society. | |||||||
| 主題 | ||||||||
| 主題Scheme | NDC | |||||||
| 主題 | 420 | |||||||
| 内容記述 | ||||||||
| 内容記述 | Quantum metrology uses small changes in the output probabilities of a quantum measurement to estimate the magnitude of a weak interaction with the system. The sensitivity of this procedure depends on the relation between the input state, the measurement results, and the generator observable describing the effect of the weak interaction on the system. This is similar to the situation in weak measurements, where the weak value of an observable exhibits a symmetric dependence on initial and final conditions. In this paper, it is shown that the phase sensitivity of a quantum measurement is in fact given by the variance of the imaginary parts of the weak values of the generator over the different measurement outcomes. It is then possible to include the limitations of a specific quantum measurement in the uncertainty bound for phase estimates by subtracting the variance of the real parts of the weak values from the initial generator uncertainty. This uncertainty relation can be interpreted as the time-symmetric formulation of the uncertainty limit of quantum metrology, where the real parts of the weak values represent the information about the generator observable in the final measurement result. | |||||||
| 言語 | en | |||||||
| 出版者 | ||||||||
| 出版者 | American Physical Society | |||||||
| 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 | |||||||
| 出版タイプ | ||||||||
| 出版タイプ | VoR | |||||||
| 出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||||
| 関連情報 | ||||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | 10.1103/PhysRevA.83.022106 | |||||||
| 関連情報 | ||||||||
| 識別子タイプ | DOI | |||||||
| 関連識別子 | http://dx.doi.org/10.1103/PhysRevA.83.022106 | |||||||
| 収録物識別子 | ||||||||
| 収録物識別子タイプ | ISSN | |||||||
| 収録物識別子 | 1050-2947 | |||||||
| 収録物識別子 | ||||||||
| 収録物識別子タイプ | NCID | |||||||
| 収録物識別子 | AA10764867 | |||||||
| 開始ページ | ||||||||
| 開始ページ | 022106-1 | |||||||
| 書誌情報 |
Physical Review A Physical Review A 巻 83, p. 022106-1-022106-5, 発行日 2011-02-22 |
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| 旧ID | 31896 | |||||||
