High-Dimensional Pixel Entanglement: Efficient Generation and Certification

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14610%2F20%3A00118176" target="_blank" >RIV/00216224:14610/20:00118176 - isvavai.cz</a>

Result on the web

<a href="https://doi.org/10.22331/q-2020-12-24-376" target="_blank" >https://doi.org/10.22331/q-2020-12-24-376</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.22331/q-2020-12-24-376" target="_blank" >10.22331/q-2020-12-24-376</a>

Result language

angličtina

Original language name

High-Dimensional Pixel Entanglement: Efficient Generation and Certification

Original language description

Photons offer the potential to carry large amounts of information in their spectral, spatial, and polarisation degrees of freedom. While state-of-the-art classical communication systems routinely aim to maximize this information-carrying capacity via wavelength and spatial-mode division multiplexing, quantum systems based on multi-mode entanglement usually suffer from low state quality, long measurement times, and limited encoding capacity. At the same time, entanglement certification methods often rely on assumptions that compromise security. Here we show the certification of photonic high-dimensional entanglement in the transverse position-momentum degree-of-freedom with a record quality, measurement speed, and entanglement dimensionality, without making any assumptions abolit the state or channels. Using a tailored macro-pixel basis, precise spatial-mode measurements, and a modified entanglement witness, we demonstrate state fidelities of up to 94.4% in a 19-dimensional state-space, entanglement in up to 55 local dimensions, and an entanglement-of-formation of up to 4 obits. Furthermore, our measurement times show an improvement of more than two orders of magnitude over previous state-of-the-art demonstrations. Our results pave the way for noise-robust quantum networks that saturate the information-carrying capacity of single photons.

Czech name

—

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

2020

Confidentiality

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

Name of the periodical

QUANTUM

ISSN

2521-327X

e-ISSN

—

Volume of the periodical

4

Issue of the periodical within the volume

December

Country of publishing house

AT - AUSTRIA

Number of pages

19

Pages from-to

376

UT code for WoS article

000606340200001

EID of the result in the Scopus database

2-s2.0-85099300459