dorsal/arxiv
View SchemaExperimental Quantum Cloning of Single Photons
| Authors | Antia Lamas-Linares, Christoph Simon, John C. Howell, Dik Bouwmeester |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0205149 |
| URL | https://arxiv.org/abs/quant-ph/0205149 |
| DOI | 10.1126/science.1068972 |
| Journal | Science 296, 712 (2002) |
Abstract
Although perfect copying of unknown quantum systems is forbidden by the laws of quantum mechanics, approximate cloning is possible. A natural way of realizing quantum cloning of photons is by stimulated emission. In this context the fundamental quantum limit to the quality of the clones is imposed by the unavoidable presence of spontaneous emission. In our experiment a single input photon stimulates the emission of additional photons from a source based on parametric down-conversion. This leads to the production of quantum clones with near optimal fidelity. We also demonstrate universality of the copying procedure by showing that the same fidelity is achieved for arbitrary input states.
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"abstract": "Although perfect copying of unknown quantum systems is forbidden by the laws\nof quantum mechanics, approximate cloning is possible. A natural way of\nrealizing quantum cloning of photons is by stimulated emission. In this context\nthe fundamental quantum limit to the quality of the clones is imposed by the\nunavoidable presence of spontaneous emission. In our experiment a single input\nphoton stimulates the emission of additional photons from a source based on\nparametric down-conversion. This leads to the production of quantum clones with\nnear optimal fidelity. We also demonstrate universality of the copying\nprocedure by showing that the same fidelity is achieved for arbitrary input\nstates.",
"arxiv_id": "quant-ph/0205149",
"authors": [
"Antia Lamas-Linares",
"Christoph Simon",
"John C. Howell",
"Dik Bouwmeester"
],
"categories": [
"quant-ph"
],
"doi": "10.1126/science.1068972",
"journal_ref": "Science 296, 712 (2002)",
"title": "Experimental Quantum Cloning of Single Photons",
"url": "https://arxiv.org/abs/quant-ph/0205149"
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