Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers
Fuente:
arXiv
Guardado en:
| Autores principales: | , , , , , |
|---|---|
| Formato: | Preprint |
| Publicado: |
2023
|
| Materias: | |
| Acceso en línea: | |
| Etiquetas: |
Agregar Etiqueta
Sin Etiquetas, Sea el primero en etiquetar este registro!
|
| _version_ | 1866916112904486912 |
|---|---|
| author | Schlichtholz, Konrad Linowski, Tomasz Walschaers, Mattia Treps, Nicolas Rudnicki, Łukasz Sorelli, Giacomo |
| author_facet | Schlichtholz, Konrad Linowski, Tomasz Walschaers, Mattia Treps, Nicolas Rudnicki, Łukasz Sorelli, Giacomo |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2303_02654 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers Schlichtholz, Konrad Linowski, Tomasz Walschaers, Mattia Treps, Nicolas Rudnicki, Łukasz Sorelli, Giacomo Quantum Physics 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. |
| title | Practical tests for sub-Rayleigh source discriminations with imperfect demultiplexers |
| topic | Quantum Physics |
| url | https://arxiv.org/abs/2303.02654 |