Nonlocal Temporal Interferometry for Highly Resilient Free-Space Quantum Communication

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Nonlocal Temporal Interferometry for Highly Resilient Free-Space Quantum Communication

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

—

Continuities

S - Specificky vyzkum na vysokych skolach

Publication year

2023

Confidentiality

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

Name of the periodical

Physical Review X

ISSN

2160-3308

e-ISSN

—

Volume of the periodical

13

Issue of the periodical within the volume

2

Country of publishing house

US - UNITED STATES

Number of pages

12

Pages from-to

1-12

UT code for WoS article

000996219700001

EID of the result in the Scopus database

2-s2.0-85153848141