Quantum non-Gaussianity certification of photon number-resolving detectors
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Quantum non-Gaussianity certification of photon number-resolving detectors
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
<a href="/en/project/GA21-18545S" target="_blank" >GA21-18545S: Photonic network assisted quantum metrology</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
OPTICS EXPRESS
ISSN
1094-4087
e-ISSN
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Volume of the periodical
30
Issue of the periodical within the volume
18
Country of publishing house
US - UNITED STATES
Number of pages
15
Pages from-to
33097-33111
UT code for WoS article
000850229100126
EID of the result in the Scopus database
2-s2.0-85138617166