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Article Dans Une Revue Quantum Année : 2024

Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers

Konrad Schlichtholz
  • Fonction : Auteur
Tomasz Linowski
  • Fonction : Auteur
Łukasz Rudnicki
  • Fonction : Auteur

Résumé

Quantum-optimal discrimination between one and two closely separated light sources can be achieved by ideal spatial-mode demultiplexing, simply monitoring whether a photon is detected in a single antisymmetric mode. However, we show that for any, no matter how small, imperfections of the demultiplexer, this simple statistical test becomes practically useless, i.e. as good as flipping a coin. While we identify a class of separation-independent tests with vanishing error probabilities in the limit of large numbers of detected photons, they are generally unreliable beyond that very limit. As a practical alternative, we propose a simple semi-separation-independent test, which provides a method for designing reliable experiments, through arbitrary control over the maximal probability of error.

Dates et versions

hal-04042748 , version 1 (23-03-2023)

Identifiants

Citer

Konrad Schlichtholz, Tomasz Linowski, Mattia Walschaers, Nicolas Treps, Łukasz Rudnicki, et al.. Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers. Quantum, 2024, 2, pp.29-34. ⟨10.1364/OPTICAQ.502459⟩. ⟨hal-04042748⟩
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