dorsal/arxiv
View SchemaQuantum Bayesian methods and subsequent measurements
| Authors | Filippo Neri |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0508012 |
| URL | https://arxiv.org/abs/quant-ph/0508012 |
| DOI | 10.1103/PhysRevA.72.062306 |
| Journal | Phys.Rev.A 72, 062306 (2005) |
Abstract
After a derivation of the quantum Bayes theorem, and a discussion of the reconstruction of the unknown state of identical spin systems by repeated measurements, the main part of this paper treats the problem of determining the unknown phase difference of two coherent sources by photon measurements. While the approach of this paper is based on computing correlations of actual measurements (photon detections), it is possible to derive indirectly a probability distribution for the phase difference. In this approach, the quantum phase is not an observable, but a parameter of an unknown quantum state. Photon measurements determine a probability distribution for the phase difference. The approach used in this paper takes into account both photon statistics and the finite efficiency of the detectors.
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"abstract": "After a derivation of the quantum Bayes theorem, and a discussion of the\nreconstruction of the unknown state of identical spin systems by repeated\nmeasurements, the main part of this paper treats the problem of determining the\nunknown phase difference of two coherent sources by photon measurements. While\nthe approach of this paper is based on computing correlations of actual\nmeasurements (photon detections), it is possible to derive indirectly a\nprobability distribution for the phase difference. In this approach, the\nquantum phase is not an observable, but a parameter of an unknown quantum\nstate. Photon measurements determine a probability distribution for the phase\ndifference. The approach used in this paper takes into account both photon\nstatistics and the finite efficiency of the detectors.",
"arxiv_id": "quant-ph/0508012",
"authors": [
"Filippo Neri"
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"doi": "10.1103/PhysRevA.72.062306",
"journal_ref": "Phys.Rev.A 72, 062306 (2005)",
"title": "Quantum Bayesian methods and subsequent measurements",
"url": "https://arxiv.org/abs/quant-ph/0508012"
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