Quantum non-Gaussianity certification of photon number-resolving detectors

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73613695" target="_blank" >RIV/61989592:15310/22:73613695 - isvavai.cz</a>

Výsledek na webu

<a href="https://opg.optica.org/directpdfaccess/b0d3fff0-500b-4832-9f818bca992b406d_495645/oe-30-18-33097.pdf" target="_blank" >https://opg.optica.org/directpdfaccess/b0d3fff0-500b-4832-9f818bca992b406d_495645/oe-30-18-33097.pdf</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1364/OE.463786" target="_blank" >10.1364/OE.463786</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Quantum non-Gaussianity certification of photon number-resolving detectors

Popis výsledku v původním jazyce

We report on direct experimental certification of the quantum non-Gaussian character of a photon number-resolving detector. The certification protocol is based on an adaptation of the existing quantum non-Gaussianity criteria for quantum states to quantum measurements. In our approach, it suffices to probe the detector with a vacuum state and two different thermal states to test its quantum non-Gaussianity. The certification is experimentally demonstrated for the detector formed by a spatially multiplexed array of ten single-photon avalanche photodiodes. We confirm the quantum non-Gaussianity of POVM elements (Pi) over cap (m) associated with the m-fold coincidence counts, up to m= 7. The experimental ability to certify from the first principles the quantum nonGaussian character of (Pi) over cap (m) is for large m limited by low probability of the measurement outcomes, especially for vacuum input state. We find that the injection of independent Gaussian background noise into the detector can be helpful and may reduce the measurement time required for reliable confirmation of quantum non-Gaussianity. In addition, we modified and experimentally verified the quantum non-Gaussianity certification protocol employing a third thermal state instead of a vacuum to speed up the whole measurement. Our findings demonstrate the existence of efficient tools for the practical characterization of fundamental non-classical properties and benchmarking of complex optical quantum detectors.

Název v anglickém jazyce

Quantum non-Gaussianity certification of photon number-resolving detectors

Popis výsledku anglicky

We report on direct experimental certification of the quantum non-Gaussian character of a photon number-resolving detector. The certification protocol is based on an adaptation of the existing quantum non-Gaussianity criteria for quantum states to quantum measurements. In our approach, it suffices to probe the detector with a vacuum state and two different thermal states to test its quantum non-Gaussianity. The certification is experimentally demonstrated for the detector formed by a spatially multiplexed array of ten single-photon avalanche photodiodes. We confirm the quantum non-Gaussianity of POVM elements (Pi) over cap (m) associated with the m-fold coincidence counts, up to m= 7. The experimental ability to certify from the first principles the quantum nonGaussian character of (Pi) over cap (m) is for large m limited by low probability of the measurement outcomes, especially for vacuum input state. We find that the injection of independent Gaussian background noise into the detector can be helpful and may reduce the measurement time required for reliable confirmation of quantum non-Gaussianity. In addition, we modified and experimentally verified the quantum non-Gaussianity certification protocol employing a third thermal state instead of a vacuum to speed up the whole measurement. Our findings demonstrate the existence of efficient tools for the practical characterization of fundamental non-classical properties and benchmarking of complex optical quantum detectors.

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

<a href="/cs/project/GA21-18545S" target="_blank" >GA21-18545S: Kvantová metrologie založená na fotonických sítích</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

OPTICS EXPRESS

ISSN

1094-4087

e-ISSN

—

Svazek periodika

30

Číslo periodika v rámci svazku

18

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

15

Strana od-do

33097-33111

Kód UT WoS článku

000850229100126

EID výsledku v databázi Scopus

2-s2.0-85138617166