Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources
Abstract
Superresolution is one of the key issues at the crossroads of contemporary quantum optics and metrology. Recently, it was shown that for an idealized case of two balanced sources, spatial mode demultiplexing (SPADE) achieves resolution better than direct imaging even in the presence of measurement crosstalk [Phys. Rev. Lett. 125, 100501 (2020)]. In this work, we consider arbitrarily unbalanced sources and provide a systematic analysis of the impact of crosstalk on the resolution obtained from SPADE. As we dissect, in this generalized scenario, SPADE's effectiveness depends non-trivially on the strength of crosstalk, relative brightness and the separation between the sources. In particular, for any source imbalance, SPADE performs worse than ideal direct imaging in the asymptotic limit of vanishing source separations. Nonetheless, for realistic values of crosstalk strength, SPADE is still the superior method for several orders of magnitude of source separations.
Keywords
Cite
@article{arxiv.2211.09157,
title = {Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources},
author = {Tomasz Linowski and Konrad Schlichtholz and Giacomo Sorelli and Manuel Gessner and Mattia Walschaers and Nicolas Treps and Łukasz Rudnicki},
journal= {arXiv preprint arXiv:2211.09157},
year = {2023}
}
Comments
10 pages, 6 figures