dorsal/arxiv
View SchemaQuantum and classical correlations of intense beams of light via joint photodetection
| Authors | A. Agliati, M. Bondani, A. Andreoni, G. De Cillis, M. G. A. Paris |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0508047 |
| URL | https://arxiv.org/abs/quant-ph/0508047 |
| DOI | 10.1088/1464-4266/7/12/031 |
| Journal | J. Opt. B 7, 652 (2005). |
Abstract
We address joint photodetection as a method to discriminate between the classical correlations of a thermal beam divided by a beam splitter and the quantum entanglement of a twin-beam obtained by parametric downconversion. We show that for intense beams of light the detection of the difference photocurrent may be used, in principle, in order to reveal entanglement, while the simple measurement of the correlation coefficient is not sufficient. We have experimentally measured the correlation coefficient and the variance of the difference photocurrent on several classical and quantum states. Results are in good agreement with theoretical predictions taking into account the extra noise in the generated fields that is due to the pump-laser fluctuations.
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"abstract": "We address joint photodetection as a method to discriminate between the\nclassical correlations of a thermal beam divided by a beam splitter and the\nquantum entanglement of a twin-beam obtained by parametric downconversion. We\nshow that for intense beams of light the detection of the difference\nphotocurrent may be used, in principle, in order to reveal entanglement, while\nthe simple measurement of the correlation coefficient is not sufficient. We\nhave experimentally measured the correlation coefficient and the variance of\nthe difference photocurrent on several classical and quantum states. Results\nare in good agreement with theoretical predictions taking into account the\nextra noise in the generated fields that is due to the pump-laser fluctuations.",
"arxiv_id": "quant-ph/0508047",
"authors": [
"A. Agliati",
"M. Bondani",
"A. Andreoni",
"G. De Cillis",
"M. G. A. Paris"
],
"categories": [
"quant-ph"
],
"doi": "10.1088/1464-4266/7/12/031",
"journal_ref": "J. Opt. B 7, 652 (2005).",
"title": "Quantum and classical correlations of intense beams of light via joint photodetection",
"url": "https://arxiv.org/abs/quant-ph/0508047"
},
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