Information and noise in quantum measurement
Physical Review A. Atomic, Molecular, and Optical Physics Volume 62 Issue 2
Page 022103-1-022103-9
published_at 2000-07-06
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| File | |
| Title ( eng ) |
Information and noise in quantum measurement
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| Creator | |
| Source Title |
Physical Review A. Atomic, Molecular, and Optical Physics
|
| Volume | 62 |
| Issue | 2 |
| Start Page | 022103-1 |
| End Page | 022103-9 |
| Abstract |
Even though measurement results obtained in the real world are generally both noisy and continuous, quantum measurement theory tends to emphasize the ideal limit of perfect precision and quantized measurement results. In this article, a more general concept of noisy measurements is applied to investigate the role of quantum noise in the measurement process. In particular, it is shown that the effects of quantum noise can be separated from the effects of information obtained in the measurement. However, quantum noise is required to "cover up" negative probabilities arising as the quantum limit is approached. These negative probabilities represent fundamental quantum-mechanical correlations between the measured variable and the variables affected by quantum noise.
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| Language |
eng
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| Resource Type | journal article |
| Publisher |
American Physical Society
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| Date of Issued | 2000-07-06 |
| Rights |
Copyright (c) 2000 American Physical Society.
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| Publish Type | Version of Record |
| Access Rights | open access |
| Source Identifier |
[ISSN] 1094-1622
[DOI] 10.1103/PhysRevA.62.022103
[NCID] AA10764867
[DOI] http://dx.doi.org/10.1103/PhysRevA.62.022103
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