Nonlocal Temporal Interferometry for Highly Resilient Free-Space Quantum Communication

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14610%2F23%3A00131028" target="_blank" >RIV/00216224:14610/23:00131028 - isvavai.cz</a>

Výsledek na webu

<a href="https://journals.aps.org/prx/abstract/10.1103/PhysRevX.13.021001" target="_blank" >https://journals.aps.org/prx/abstract/10.1103/PhysRevX.13.021001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevX.13.021001" target="_blank" >10.1103/PhysRevX.13.021001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Nonlocal Temporal Interferometry for Highly Resilient Free-Space Quantum Communication

Popis výsledku v původním jazyce

Entanglement distribution via photons over long distances enables many applications, including quantum key distribution, which provides unprecedented privacy. The inevitable degradation of entanglement through noise accumulated over long distances remains one of the key challenges in this area. Exploiting the potential of higher-dimensional entangled photons promises to address this challenge, but poses extreme demands on the experimental implementation. Here, we present a long-range free-space quantum link, distributing entanglement over 10.2 km with flexible dimensionality of encoding by deploying a phase-stable nonlocal Franson interferometer. With this distribution of multidimensional energy-time entangled photons, we analyze the achievable key rate in a dimensionally adaptive quantum key distribution protocol that can be optimized with respect to any environmental noise conditions. Our approach enables and emphasizes the power of high-dimensional entanglement for quantum communi-cation, yielding a positive asymptotic key rate well into the dawn of the day.

Název v anglickém jazyce

Nonlocal Temporal Interferometry for Highly Resilient Free-Space Quantum Communication

Popis výsledku anglicky

Entanglement distribution via photons over long distances enables many applications, including quantum key distribution, which provides unprecedented privacy. The inevitable degradation of entanglement through noise accumulated over long distances remains one of the key challenges in this area. Exploiting the potential of higher-dimensional entangled photons promises to address this challenge, but poses extreme demands on the experimental implementation. Here, we present a long-range free-space quantum link, distributing entanglement over 10.2 km with flexible dimensionality of encoding by deploying a phase-stable nonlocal Franson interferometer. With this distribution of multidimensional energy-time entangled photons, we analyze the achievable key rate in a dimensionally adaptive quantum key distribution protocol that can be optimized with respect to any environmental noise conditions. Our approach enables and emphasizes the power of high-dimensional entanglement for quantum communi-cation, yielding a positive asymptotic key rate well into the dawn of the day.

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

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Physical Review X

ISSN

2160-3308

e-ISSN

—

Svazek periodika

13

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

12

Strana od-do

1-12

Kód UT WoS článku

000996219700001

EID výsledku v databázi Scopus

2-s2.0-85153848141