dorsal/arxiv
View SchemaAdaptive homodyne measurement of optical phase
| Authors | Michael A. Armen, John K. Au, John K. Stockton, Andrew C. Doherty, Hideo Mabuchi |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0204005 |
| URL | https://arxiv.org/abs/quant-ph/0204005 |
| DOI | 10.1103/PhysRevLett.89.133602 |
| Journal | Phys. Rev. Lett., 89, 133602 (2002) |
Abstract
We present an experimental demonstration of the power of real-time feedback in quantum metrology, confirming a theoretical prediction by Wiseman regarding the superior performance of an adaptive homodyne technique for single-shot measurement of optical phase. For phase measurements performed on weak coherent states with no prior knowledge of the signal phase, we show that the variance of adaptive homodyne estimation approaches closer to the fundamental quantum uncertainty limit than any previously demonstrated technique. Our results underscore the importance of real-time feedback for reaching quantum performance limits in coherent telecommunication, precision measurement and information processing.
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"abstract": "We present an experimental demonstration of the power of real-time feedback\nin quantum metrology, confirming a theoretical prediction by Wiseman regarding\nthe superior performance of an adaptive homodyne technique for single-shot\nmeasurement of optical phase. For phase measurements performed on weak coherent\nstates with no prior knowledge of the signal phase, we show that the variance\nof adaptive homodyne estimation approaches closer to the fundamental quantum\nuncertainty limit than any previously demonstrated technique. Our results\nunderscore the importance of real-time feedback for reaching quantum\nperformance limits in coherent telecommunication, precision measurement and\ninformation processing.",
"arxiv_id": "quant-ph/0204005",
"authors": [
"Michael A. Armen",
"John K. Au",
"John K. Stockton",
"Andrew C. Doherty",
"Hideo Mabuchi"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.89.133602",
"journal_ref": "Phys. Rev. Lett., 89, 133602 (2002)",
"title": "Adaptive homodyne measurement of optical phase",
"url": "https://arxiv.org/abs/quant-ph/0204005"
},
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