Complete characterization of post-selected quantum statistics using weak measurement tomography
Physical Review A 81 巻 1 号
2010-01-06 発行
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種類 :
全文
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タイトル ( eng ) |
Complete characterization of post-selected quantum statistics using weak measurement tomography
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作成者 | |
収録物名 |
Physical Review A
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巻 | 81 |
号 | 1 |
抄録 |
The reconstruction of quantum states from a sufficient set of experimental data can be achieved with arbitrarily weak measurement interactions. Since such weak measurements have negligible back action, the quantum state reconstruction is also valid for the postselected subensembles usually considered in weak measurement paradoxes. It is shown that postselection can then be identified with a statistical decomposition of the initial density matrix into transient density matrices conditioned by the anticipated measurement outcomes. This result indicates that it is possible to ascribe the properties determined by the final measurement outcome to each individual quantum system before the measurement has taken place. The "collapse" of the pure state wave function in a measurement can then be understood in terms of the classical "collapse" of a probability distribution as new information becomes available.
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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 | 2010-01-06 |
権利情報 |
Copyright (c) 2010 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] 1050-2947
[DOI] 10.1103/PhysRevA.81.012103
[NCID] AA10764867
[DOI] http://dx.doi.org/10.1103/PhysRevA.81.012103
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