dorsal/arxiv
View SchemaDense Coding for Continuous Variables
| Authors | Samuel L. Braunstein, H. J. Kimble |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9910010 |
| URL | https://arxiv.org/abs/quant-ph/9910010 |
| DOI | 10.1103/PhysRevA.61.042302 |
Abstract
A scheme to achieve dense quantum coding for the quadrature amplitudes of the electromagnetic field is presented. The protocol utilizes shared entanglement provided by nondegenerate parametric down conversion in the limit of large gain to attain high efficiency. For a constraint in the mean number of photons n associated with modulation in the signal channel, the channel capacity for dense coding is found to be ln(1+n+n^2), which always beats coherent-state communication and surpasses squeezed-state communication for n>1. For n>>1, the dense coding capacity approaches twice that of either scheme.
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"abstract": "A scheme to achieve dense quantum coding for the quadrature amplitudes of the\nelectromagnetic field is presented. The protocol utilizes shared entanglement\nprovided by nondegenerate parametric down conversion in the limit of large gain\nto attain high efficiency. For a constraint in the mean number of photons n\nassociated with modulation in the signal channel, the channel capacity for\ndense coding is found to be ln(1+n+n^2), which always beats coherent-state\ncommunication and surpasses squeezed-state communication for n\u003e1. For n\u003e\u003e1, the\ndense coding capacity approaches twice that of either scheme.",
"arxiv_id": "quant-ph/9910010",
"authors": [
"Samuel L. Braunstein",
"H. J. Kimble"
],
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"quant-ph"
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"doi": "10.1103/PhysRevA.61.042302",
"title": "Dense Coding for Continuous Variables",
"url": "https://arxiv.org/abs/quant-ph/9910010"
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