High-Dimensional Pixel Entanglement: Efficient Generation and Certification

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

High-Dimensional Pixel Entanglement: Efficient Generation and Certification

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

High-Dimensional Pixel Entanglement: Efficient Generation and Certification

Popis výsledku anglicky

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.

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

2020

Kód důvěrnosti údajů

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

Název periodika

QUANTUM

ISSN

2521-327X

e-ISSN

—

Svazek periodika

4

Číslo periodika v rámci svazku

December

Stát vydavatele periodika

AT - Rakouská republika

Počet stran výsledku

19

Strana od-do

376

Kód UT WoS článku

000606340200001

EID výsledku v databázi Scopus

2-s2.0-85099300459