Entanglement of Gaussian states and the applicability to quantum key distribution over fading channels

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F12%3A33140114" target="_blank" >RIV/61989592:15310/12:33140114 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1367-2630/14/9/093048" target="_blank" >http://dx.doi.org/10.1088/1367-2630/14/9/093048</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1367-2630/14/9/093048" target="_blank" >10.1088/1367-2630/14/9/093048</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Entanglement of Gaussian states and the applicability to quantum key distribution over fading channels

Popis výsledku v původním jazyce

Entanglement properties of Gaussian states of light as well as the security of continuous variable quantum key distribution with Gaussian states in free-space fading channels are studied. These qualities are shown to be sensitive to the statistical properties of the transmittance distribution in the cases when entanglement is strong or when channel excess noise is present. Fading, i.e. transmission fluctuations, caused by beam wandering due to atmospheric turbulence, is a frequent challenge in free-space communication. We introduce a method of fading discrimination and subsequent post-selection of the corresponding sub-states and show that it can improve the entanglement resource and restore the security of the key distribution over a realistic fadinglink. Furthermore, the optimal post-selection strategy in combination with an optimized entangled resource is shown to drastically increase the protocol's robustness to excess noise, which is confirmed for experimentally measured fading c

Název v anglickém jazyce

Entanglement of Gaussian states and the applicability to quantum key distribution over fading channels

Popis výsledku anglicky

Entanglement properties of Gaussian states of light as well as the security of continuous variable quantum key distribution with Gaussian states in free-space fading channels are studied. These qualities are shown to be sensitive to the statistical properties of the transmittance distribution in the cases when entanglement is strong or when channel excess noise is present. Fading, i.e. transmission fluctuations, caused by beam wandering due to atmospheric turbulence, is a frequent challenge in free-space communication. We introduce a method of fading discrimination and subsequent post-selection of the corresponding sub-states and show that it can improve the entanglement resource and restore the security of the key distribution over a realistic fadinglink. Furthermore, the optimal post-selection strategy in combination with an optimized entangled resource is shown to drastically increase the protocol's robustness to excess noise, which is confirmed for experimentally measured fading c

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BH - Optika, masery a lasery

OECD FORD obor

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Projekt

<a href="/cs/project/GPP205%2F10%2FP321" target="_blank" >GPP205/10/P321: Vysílaní kvantové klíče se spojitými proměnnými</a><br>

Návaznosti

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

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

New Journal of Physics

ISSN

1367-2630

e-ISSN

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Svazek periodika

14

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

20

Strana od-do

"093048-1"-"093048-20"

Kód UT WoS článku

000309393400006

EID výsledku v databázi Scopus

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