dorsal/arxiv
View SchemaSingle Photon Source with Individualized Single Photon Certifications
| Authors | A. L. Migdall, D. Branning, S. Castelletto, M. Ware |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0209103 |
| URL | https://arxiv.org/abs/quant-ph/0209103 |
| DOI | 10.1117/12.452038 |
| Journal | Proc. of the SPIE Vol. 4821 p455-465(2002) |
Abstract
As currently implemented, single-photon sources cannot be made to produce single photons with high probability, while simultaneously suppressing the probability of yielding two or more photons. Because of this, single photon sources cannot really produce single photons on demand. We describe a multiplexed system that allows the probabilities of producing one and more photons to be adjusted independently, enabling a much better approximation of a source of single photons on demand. The scheme uses a heralded photon source based on parametric downconversion, but by effectively breaking the trigger detector area into multiple regions, we are able to extract more information about a heralded photon than is possible with a conventional arrangement. This scheme allows photons to be produced along with a quantitative ``certification'' that they are single photons. Some of the single-photon certifications can be significantly better than what is possible with conventional downconversion sources (using a unified trigger detector region), as well as being better than faint laser sources. With such a source of more tightly certified single photons, it should be possible to improve the maximum secure bit rate possible over a quantum cryptographic link. We present an analysis of the relative merits of this method over the conventional arrangement.
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"abstract": "As currently implemented, single-photon sources cannot be made to produce\nsingle photons with high probability, while simultaneously suppressing the\nprobability of yielding two or more photons. Because of this, single photon\nsources cannot really produce single photons on demand. We describe a\nmultiplexed system that allows the probabilities of producing one and more\nphotons to be adjusted independently, enabling a much better approximation of a\nsource of single photons on demand. The scheme uses a heralded photon source\nbased on parametric downconversion, but by effectively breaking the trigger\ndetector area into multiple regions, we are able to extract more information\nabout a heralded photon than is possible with a conventional arrangement. This\nscheme allows photons to be produced along with a quantitative\n``certification\u0027\u0027 that they are single photons. Some of the single-photon\ncertifications can be significantly better than what is possible with\nconventional downconversion sources (using a unified trigger detector region),\nas well as being better than faint laser sources. With such a source of more\ntightly certified single photons, it should be possible to improve the maximum\nsecure bit rate possible over a quantum cryptographic link. We present an\nanalysis of the relative merits of this method over the conventional\narrangement.",
"arxiv_id": "quant-ph/0209103",
"authors": [
"A. L. Migdall",
"D. Branning",
"S. Castelletto",
"M. Ware"
],
"categories": [
"quant-ph"
],
"doi": "10.1117/12.452038",
"journal_ref": "Proc. of the SPIE Vol. 4821 p455-465(2002)",
"title": "Single Photon Source with Individualized Single Photon Certifications",
"url": "https://arxiv.org/abs/quant-ph/0209103"
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