dorsal/arxiv
View SchemaQuantum Communication with Correlated Nonclassical States
| Authors | S. F. Pereira, Z. Y. Ou, H. J. Kimble |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0003094 |
| URL | https://arxiv.org/abs/quant-ph/0003094 |
| DOI | 10.1103/PhysRevA.62.042311 |
Abstract
Nonclassical correlations between the quadrature-phase amplitudes of two spatially separated optical beams are exploited to realize a two-channel quantum communication experiment with a high degree of immunity to interception. For this scheme, either channel alone can have an arbitrarily small signal-to-noise ratio (SNR) for transmission of a coherent ``message''. However, when the transmitted beams are combined properly upon authorized detection, the encoded message can in principle be recovered with the original SNR of the source. An experimental demonstration has achieved a 3.2 dB improvement in SNR over that possible with correlated classical sources. Extensions of the protocol to improve its security against eavesdropping are discussed.
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"abstract": "Nonclassical correlations between the quadrature-phase amplitudes of two\nspatially separated optical beams are exploited to realize a two-channel\nquantum communication experiment with a high degree of immunity to\ninterception. For this scheme, either channel alone can have an arbitrarily\nsmall signal-to-noise ratio (SNR) for transmission of a coherent ``message\u0027\u0027.\nHowever, when the transmitted beams are combined properly upon authorized\ndetection, the encoded message can in principle be recovered with the original\nSNR of the source. An experimental demonstration has achieved a 3.2 dB\nimprovement in SNR over that possible with correlated classical sources.\nExtensions of the protocol to improve its security against eavesdropping are\ndiscussed.",
"arxiv_id": "quant-ph/0003094",
"authors": [
"S. F. Pereira",
"Z. Y. Ou",
"H. J. Kimble"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.62.042311",
"title": "Quantum Communication with Correlated Nonclassical States",
"url": "https://arxiv.org/abs/quant-ph/0003094"
},
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