dorsal/arxiv
View SchemaContinuous Variable Quantum Cryptography - beating the 3 dB loss limit
| Authors | Ch. Silberhorn, T. C. Ralph, N. Lütkenhaus, G. Leuchs |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0204064 |
| URL | https://arxiv.org/abs/quant-ph/0204064 |
| DOI | 10.1103/PhysRevLett.89.167901 |
| Journal | Phys. Rev. Lett. 89, 167901 (2002) |
Abstract
We demonstrate that secure quantum key distribution systems based on continuous variables implementations can operate beyond the apparent 3 dB loss limit that is implied by the beam splitting attack . The loss limit was established for standard minimum uncertainty states such as coherent states. We show that by an appropriate postselection mechanism we can enter a region where Eve's knowledge falls behind the information shared between Alice and Bob even in the presence of substantial losses.
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"abstract": "We demonstrate that secure quantum key distribution systems based on\ncontinuous variables implementations can operate beyond the apparent 3 dB loss\nlimit that is implied by the beam splitting attack . The loss limit was\nestablished for standard minimum uncertainty states such as coherent states. We\nshow that by an appropriate postselection mechanism we can enter a region where\nEve\u0027s knowledge falls behind the information shared between Alice and Bob even\nin the presence of substantial losses.",
"arxiv_id": "quant-ph/0204064",
"authors": [
"Ch. Silberhorn",
"T. C. Ralph",
"N. L\u00fctkenhaus",
"G. Leuchs"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevLett.89.167901",
"journal_ref": "Phys. Rev. Lett. 89, 167901 (2002)",
"title": "Continuous Variable Quantum Cryptography - beating the 3 dB loss limit",
"url": "https://arxiv.org/abs/quant-ph/0204064"
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