dorsal/arxiv
View SchemaEquivalent efficiency of a simulated photon-number detector
| Authors | K. Nemoto, S. L. Braunstein |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0111087 |
| URL | https://arxiv.org/abs/quant-ph/0111087 |
| DOI | 10.1103/PhysRevA.66.032306 |
Abstract
Homodyne detection is considered as a way to improve the efficiency of communication near the single-photon level. The current lack of commercially available {\it infrared} photon-number detectors significantly reduces the mutual information accessible in such a communication channel. We consider simulating direct detection via homodyne detection. We find that our particular simulated direct detection strategy could provide limited improvement in the classical information transfer. However, we argue that homodyne detectors (and a polynomial number of linear optical elements) cannot simulate photocounters arbitrarily well, since otherwise the exponential gap between quantum and classical computers would vanish.
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"abstract": "Homodyne detection is considered as a way to improve the efficiency of\ncommunication near the single-photon level. The current lack of commercially\navailable {\\it infrared} photon-number detectors significantly reduces the\nmutual information accessible in such a communication channel. We consider\nsimulating direct detection via homodyne detection. We find that our particular\nsimulated direct detection strategy could provide limited improvement in the\nclassical information transfer. However, we argue that homodyne detectors (and\na polynomial number of linear optical elements) cannot simulate photocounters\narbitrarily well, since otherwise the exponential gap between quantum and\nclassical computers would vanish.",
"arxiv_id": "quant-ph/0111087",
"authors": [
"K. Nemoto",
"S. L. Braunstein"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.66.032306",
"title": "Equivalent efficiency of a simulated photon-number detector",
"url": "https://arxiv.org/abs/quant-ph/0111087"
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