On the role of complex phases in the quantum statistics of weak measurements
New Journal of Physics 13 巻
103009- 頁
2011 発行
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タイトル ( eng ) |
On the role of complex phases in the quantum statistics of weak measurements
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作成者 | |
収録物名 |
New Journal of Physics
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巻 | 13 |
開始ページ | 103009 |
抄録 |
Weak measurements carried out between quantum state preparation and post-selection result in complex values for self-adjoint operators, corresponding to complex conditional probabilities for the projections on specific eigenstates. In this paper it is shown that the complex phases of these weak conditional probabilities describe the dynamic response of the system to unitary transformations. Quantum mechanics thus unifies the statistical overlap of different states with the dynamical structure of transformations between these states. Specifically, it is possible to identify the phase of weak conditional probabilities directly with the action of a unitary transform that maximizes the overlap of initial and final states. This action provides a quantitative measure of how much quantum correlations can diverge from the deterministic relations between physical properties expected from classical physics or hidden variable theories. In terms of quantum information, the phases of weak conditional probabilities thus represent the logical tension between sets of three quantum states that is at the heart of quantum paradoxes.
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著者キーワード |
Component
Spin
Particle
Values
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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 |
Iop Publishing Led
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発行日 | 2011 |
権利情報 |
(c) 2013 IOP Publishing
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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] 1367-2630
[DOI] 10.1088/1367-2630/13/10/103009
[DOI] http://dx.doi.org/10.1088/1367-2630/13/10/103009
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