dorsal/arxiv
View SchemaComment on "Decoy State Quantum Key Distribution"
| Authors | Xiang-Bin Wang |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0501143 |
| URL | https://arxiv.org/abs/quant-ph/0501143 |
Abstract
The main claim by H.K. Lo et al that they have for the first time made the decoy-state method efficiently work in practice is inappropriate. We show that, prior to our work, actually (and obviously) none of proposals raised by H.K. Lo et al can really work in practice. Their main protocol requires infinite number of different coherent states which is in principle impossible for any set-up. Their idea of using very weak coherent state as decoy state doesn't work either by our detailed analysis. The idea implicitly requires an unreasonablly large number of pulses which needs at least 14 days to produce, if they want to do QKD over a distance of 120-130km.
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"date_created": "2026-03-02T18:02:13.035000Z",
"date_modified": "2026-03-02T18:02:13.035000Z",
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"abstract": "The main claim by H.K. Lo et al that they have for the first time made the\ndecoy-state method efficiently work in practice is inappropriate. We show that,\nprior to our work, actually (and obviously) none of proposals raised by H.K. Lo\net al can really work in practice. Their main protocol requires infinite number\nof different coherent states which is in principle impossible for any set-up.\nTheir idea of using very weak coherent state as decoy state doesn\u0027t work either\nby our detailed analysis. The idea implicitly requires an unreasonablly large\nnumber of pulses which needs at least 14 days to produce, if they want to do\nQKD over a distance of 120-130km.",
"arxiv_id": "quant-ph/0501143",
"authors": [
"Xiang-Bin Wang"
],
"categories": [
"quant-ph"
],
"title": "Comment on \"Decoy State Quantum Key Distribution\"",
"url": "https://arxiv.org/abs/quant-ph/0501143"
},
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