Preparing the deployment of Quantum Key Distribution over a classical network infrastructure in Prague

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F63839172%3A_____%2F23%3A10133615" target="_blank" >RIV/63839172:_____/23:10133615 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68407700:21230/23:00367143 RIV/68407700:21340/23:00367143

Výsledek na webu

<a href="https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12570/2665653/Preparing-the-deployment-of-quantum-key-distribution-over-a-classical/10.1117/12.2665653.short" target="_blank" >https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12570/2665653/Preparing-the-deployment-of-quantum-key-distribution-over-a-classical/10.1117/12.2665653.short</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1117/12.2665653" target="_blank" >10.1117/12.2665653</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Preparing the deployment of Quantum Key Distribution over a classical network infrastructure in Prague

Popis výsledku v původním jazyce

Quantum Key Distribution (QKD) is a promising tool for secure communication in the near future. In combination with one-time-pad technique, it provides an unconditionally secure communication channel (meaning that it is secure against an adversary, even with unlimited computational power), at least in principle. However, a major implementation challenge for some schemes is the reliable creation, transportation, and measurement of entangled photon pairs over long-distance fiber networks. Our project aims to explore the possibilities for distributing quantum information on an existing network infrastructure while measuring the effects of real-world conditions. We characterized a commercial source of entangled photons. We measured its spectrum, brightness (1.6+-0.3)x104 pairs/s/µW, and performed quantum state tomography (QST) to reconstruct the density matrix of the quantum state. Our implementation focuses on an all-fiber solution, which would enable a simplified QKD implementation. In laboratory conditions, we achieved the visibility equal to (0.957 +- 0.004) as a mean in both bases with a coincidence rate of (275 +- 4) counts/s and successfully ran QKD protocol with secret key rate of (86 +- 1) bits/s and average quantum bit error rate (QBER) of (4.8 +- 0.7) %

Název v anglickém jazyce

Preparing the deployment of Quantum Key Distribution over a classical network infrastructure in Prague

Popis výsledku anglicky

Quantum Key Distribution (QKD) is a promising tool for secure communication in the near future. In combination with one-time-pad technique, it provides an unconditionally secure communication channel (meaning that it is secure against an adversary, even with unlimited computational power), at least in principle. However, a major implementation challenge for some schemes is the reliable creation, transportation, and measurement of entangled photon pairs over long-distance fiber networks. Our project aims to explore the possibilities for distributing quantum information on an existing network infrastructure while measuring the effects of real-world conditions. We characterized a commercial source of entangled photons. We measured its spectrum, brightness (1.6+-0.3)x104 pairs/s/µW, and performed quantum state tomography (QST) to reconstruct the density matrix of the quantum state. Our implementation focuses on an all-fiber solution, which would enable a simplified QKD implementation. In laboratory conditions, we achieved the visibility equal to (0.957 +- 0.004) as a mean in both bases with a coincidence rate of (275 +- 4) counts/s and successfully ran QKD protocol with secret key rate of (86 +- 1) bits/s and average quantum bit error rate (QBER) of (4.8 +- 0.7) %

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20202 - Communication engineering and systems

Projekt

<a href="/cs/project/LM2023054" target="_blank" >LM2023054: e-Infrastruktura CZ</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Quantum Optics and Photon Counting 2023

ISBN

978-1-5106-6260-5

ISSN

0277-786X

e-ISSN

—

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

SPIE

Místo vydání

Bellingham, Washington USA

Místo konání akce

Praha

Datum konání akce

24. 4. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

001023007300004