dorsal/arxiv
View SchemaSecurity of Quantum Key Distribution with Realistic Devices
| Authors | Xiongfeng Ma |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0503057 |
| URL | https://arxiv.org/abs/quant-ph/0503057 |
Abstract
We simulate quantum key distribution (QKD) experimental setups and give out some improvement for QKD procedures. A new data post-processing protocol is introduced, mainly including error correction and privacy amplification. This protocol combines the ideas of GLLP and the decoy states, which essentially only requires to turn up and down the source power. We propose a practical way to perform the decoy state method, which mainly follows the idea of Lo's decoy state. A new data post-processing protocol is then developed for the QKD scheme with the decoy state. We first study the optimal expected photon number mu of the source for the improved QKD scheme. We get the new optimal mu=O(1) comparing with former mu=O(eta), where eta is the overall transmission efficiency. With this protocol, we can then improve the key generation rate from quadratic of transmission efficiency O(eta2) to O(eta). Based on the recent experimental setup, we obtain the maximum secure transmission distance of over 140 km.
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"date_created": "2026-03-02T18:02:13.462000Z",
"date_modified": "2026-03-02T18:02:13.462000Z",
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"record": {
"abstract": "We simulate quantum key distribution (QKD) experimental setups and give out\nsome improvement for QKD procedures. A new data post-processing protocol is\nintroduced, mainly including error correction and privacy amplification. This\nprotocol combines the ideas of GLLP and the decoy states, which essentially\nonly requires to turn up and down the source power. We propose a practical way\nto perform the decoy state method, which mainly follows the idea of Lo\u0027s decoy\nstate. A new data post-processing protocol is then developed for the QKD scheme\nwith the decoy state. We first study the optimal expected photon number mu of\nthe source for the improved QKD scheme. We get the new optimal mu=O(1)\ncomparing with former mu=O(eta), where eta is the overall transmission\nefficiency. With this protocol, we can then improve the key generation rate\nfrom quadratic of transmission efficiency O(eta2) to O(eta). Based on the\nrecent experimental setup, we obtain the maximum secure transmission distance\nof over 140 km.",
"arxiv_id": "quant-ph/0503057",
"authors": [
"Xiongfeng Ma"
],
"categories": [
"quant-ph"
],
"title": "Security of Quantum Key Distribution with Realistic Devices",
"url": "https://arxiv.org/abs/quant-ph/0503057"
},
"schema_id": "dorsal/arxiv",
"source": {
"execution_id": "ec80285b-7141-4b22-b077-e1e483572f56",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
"version": "0.1.0"
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}