Continuous-variable quantum key distribution at 10 GBaud using an integrated photonic-electronic receiver

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F24%3A73626073" target="_blank" >RIV/61989592:15310/24:73626073 - isvavai.cz</a>

Výsledek na webu

<a href="https://opg.optica.org/directpdfaccess/39a0ce73-2b85-4210-972c5ea802f030a3_554789/optica-11-9-1197.pdf" target="_blank" >https://opg.optica.org/directpdfaccess/39a0ce73-2b85-4210-972c5ea802f030a3_554789/optica-11-9-1197.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OPTICA.530080" target="_blank" >10.1364/OPTICA.530080</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Continuous-variable quantum key distribution at 10 GBaud using an integrated photonic-electronic receiver

Popis výsledku v původním jazyce

Quantum key distribution (QKD) is a widely recognized application of quantum information theory, guaranteeing information-theoretically secure key exchange. However, commercial viability of QKD systems is currently impeded by issues such as scalability, network integration, and high manufacturing costs. Low-cost, high-volume production of photonic and electronic integrated circuits could be the breakthrough needed for broad-scale deployment of cutting-edge QKD systems. Here, we present a continuous-variable (CV) QKD system that is based on an integrated photonic-electronic receiver. It combines a silicon photonic integrated circuit, featuring a phase-diverse receiver, with custom-designed GaAs pHEMT transimpedance amplifiers. Operating at a classical telecom symbol rate of 10 GBaud, our QKD system generates high secret key rates - exceeding 0.7 Gb/s over a 5 km distance and 0.3 Gb/s over a 10 km. The secret keys are secure against collective attacks, even when accounting for finite-size effects in the parameter estimation, thanks to well-designed digital signal processing that enables broadband system operation. Our experiment sets a record for secure key exchange and paves the way for the implementation of real-time broadband CV-QKD systems.

Název v anglickém jazyce

Continuous-variable quantum key distribution at 10 GBaud using an integrated photonic-electronic receiver

Popis výsledku anglicky

Quantum key distribution (QKD) is a widely recognized application of quantum information theory, guaranteeing information-theoretically secure key exchange. However, commercial viability of QKD systems is currently impeded by issues such as scalability, network integration, and high manufacturing costs. Low-cost, high-volume production of photonic and electronic integrated circuits could be the breakthrough needed for broad-scale deployment of cutting-edge QKD systems. Here, we present a continuous-variable (CV) QKD system that is based on an integrated photonic-electronic receiver. It combines a silicon photonic integrated circuit, featuring a phase-diverse receiver, with custom-designed GaAs pHEMT transimpedance amplifiers. Operating at a classical telecom symbol rate of 10 GBaud, our QKD system generates high secret key rates - exceeding 0.7 Gb/s over a 5 km distance and 0.3 Gb/s over a 10 km. The secret keys are secure against collective attacks, even when accounting for finite-size effects in the parameter estimation, thanks to well-designed digital signal processing that enables broadband system operation. Our experiment sets a record for secure key exchange and paves the way for the implementation of real-time broadband CV-QKD systems.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

<a href="/cs/project/GN22-28254O" target="_blank" >GN22-28254O: Praktická víceuživatelská bezpečná kvantová komunikace</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Optica

ISSN

2334-2536

e-ISSN

—

Svazek periodika

11

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

1197-1204

Kód UT WoS článku

001332930600002

EID výsledku v databázi Scopus

2-s2.0-85204456455