dorsal/arxiv
View SchemaEfficient and Robust Quantum Key Distribution With Minimal State Tomography
| Authors | Berthold-Georg Englert, Dagomir Kaszlikowski, Hui Khoon Ng, Wee Kang Chua, Jaroslav Řeháček, Janet Anders |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0412075 |
| URL | https://arxiv.org/abs/quant-ph/0412075 |
Abstract
We introduce the Singapore protocol, a qubit protocol for quantum key distribution that is fully tomographic, more efficient than other tomographic protocols, and very robust. Under ideal circumstances the efficiency is log_2(4/3)=0.415 key bits per qubit sent. This is 25% more than the efficiency of 1/3=0.333 for the standard six-state protocol, which sets the benchmark. We describe a simple two-way communication scheme that extracts 0.4 key bits per qubit and thus gets close to the information-theoretical limit. The noise thresholds that we report for a hierarchy of eavesdropping attacks demonstrate the robustness of the protocol: A secure key can be extracted if there is less than 38.9% noise.
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"date_created": "2026-03-02T18:02:13.326000Z",
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"abstract": "We introduce the Singapore protocol, a qubit protocol for quantum key\ndistribution that is fully tomographic, more efficient than other tomographic\nprotocols, and very robust. Under ideal circumstances the efficiency is\nlog_2(4/3)=0.415 key bits per qubit sent. This is 25% more than the efficiency\nof 1/3=0.333 for the standard six-state protocol, which sets the benchmark. We\ndescribe a simple two-way communication scheme that extracts 0.4 key bits per\nqubit and thus gets close to the information-theoretical limit. The noise\nthresholds that we report for a hierarchy of eavesdropping attacks demonstrate\nthe robustness of the protocol: A secure key can be extracted if there is less\nthan 38.9% noise.",
"arxiv_id": "quant-ph/0412075",
"authors": [
"Berthold-Georg Englert",
"Dagomir Kaszlikowski",
"Hui Khoon Ng",
"Wee Kang Chua",
"Jaroslav \u0158eh\u00e1\u010dek",
"Janet Anders"
],
"categories": [
"quant-ph"
],
"title": "Efficient and Robust Quantum Key Distribution With Minimal State Tomography",
"url": "https://arxiv.org/abs/quant-ph/0412075"
},
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