Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers
| Autor: | Schlichtholz, Konrad, Linowski, Tomasz, Walschaers, Mattia, Treps, Nicolas, Rudnicki, Łukasz, Sorelli, Giacomo |
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| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Optica Quantum 2, 29-34 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1364/OPTICAQ.502459 |
| Popis: | 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. Comment: 5 pages + Supplementary Material |
| Databáze: | arXiv |
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