How Weak Values Emerge in Joint Measurements on Cloned Quantum Systems
Physical Review Letters 109 巻 2 号
020408- 頁
2012 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
How Weak Values Emerge in Joint Measurements on Cloned Quantum Systems
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| 作成者 | |
| 収録物名 |
Physical Review Letters
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| 巻 | 109 |
| 号 | 2 |
| 開始ページ | 020408 |
| 抄録 |
A statistical analysis of optimal universal cloning shows that it is possible to identify an ideal (but nonpositive) copying process that faithfully maps all properties of the original Hilbert space onto two separate quantum systems, resulting in perfect correlations for all observables. The joint probabilities for noncommuting measurements on separate clones then correspond to the real parts of the complex joint probabilities observed in weak measurements on a single system, where the measurements on the two clones replace the corresponding sequence of weak measurement and postselection. The imaginary parts of weak measurement statics can be obtained by replacing the cloning process with a partial swap operation. A controlled-swap operation combines both processes, making the complete weak measurement statistics accessible as a well-defined contribution to the joint probabilities of fully resolved projective measurements on the two output systems.
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| 著者キーワード |
Photons
Cloning
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| NDC分類 |
物理学 [ 420 ]
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| 言語 |
英語
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| 資源タイプ | 学術雑誌論文 |
| 出版者 |
American Physical Society
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| 発行日 | 2012 |
| 権利情報 |
(c) 2012 American Physical Society
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 0031-9007
[DOI] 10.1103/PhysRevLett.109.020408
[NCID] AA00773679
[DOI] http://dx.doi.org/10.1103/PhysRevLett.109.020408
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