Accidental coincidences in camera-based high-dimensional entanglement certification
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F25%3A00388636" target="_blank" >RIV/68407700:21340/25:00388636 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1364/OL.569075" target="_blank" >https://doi.org/10.1364/OL.569075</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OL.569075" target="_blank" >10.1364/OL.569075</a>
Alternative languages
Result language
angličtina
Original language name
Accidental coincidences in camera-based high-dimensional entanglement certification
Original language description
High-dimensional entangled states, such as spatially entangled photon pairs produced by spontaneous parametric down-conversion (SPDC), are a key resource for quantum technologies. In recent years, camera-based coincidence counting approaches have considerably improved the ability to characterize them in terms of speed and dimensionality. However, these methods have limitations, including in most of them the necessity to subtract accidental coincidences. Here, we study the role of these accidentals in entanglement certification for a single-photon avalanche diode (SPAD) array and an intensified time-stamping (Tpx3Cam) camera. Using both Einstein-Podolsky-Rosen (EPR) and entropy-based criteria, we show that the level of accidental coincidences-determined by the temporal characteristics of the camera-and whether they are subtracted critically impact entanglement certification. In particular, we demonstrate that current single-photon camera technologies enable entanglement certification without accidental subtraction only if a Gaussian approximation is applied to the measured two-photon state. Our work is important for developing quantum-optics applications in adversarial scenarios, such as high-dimensional quantum key distribution (HD-QKD) and also for loophole-free experimental testing of quantum foundations. (c) 2025 Optica Publishing Group. All rights, including for text and data mining (TDM), Artificial Intelligence (AI) training, and similar technologies, are reserved.
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
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Optics Letters
ISSN
0146-9592
e-ISSN
1539-4794
Volume of the periodical
50
Issue of the periodical within the volume
24
Country of publishing house
US - UNITED STATES
Number of pages
4
Pages from-to
7532-7535
UT code for WoS article
001637536900005
EID of the result in the Scopus database
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