TY  - JOUR
AU  - Linowski, T.
AU  - Schlichtholz, K.
AU  - Sorelli, G.
AU  - Gessner, M.
AU  - Walschaers, M.
AU  - Treps, N.
AU  - Rudnicki, L.
PY  - 2023
DA  - 2023//
TI  - Application range of crosstalk-affected spatial demultiplexing for resolving separations between unbalanced sources
T2  - New J. Phys.
JO  - New Journal of Physics
SP  - 103050
EP  - 13pp
VL  - 25
IS  - 10
PB  - IOP Publishing Ltd
KW  - super resolution
KW  - spatial demultiplexing
KW  - crosstalk
KW  - unbalanced sources
KW  - Fisher information
KW  - measurement precision
AB  - Super resolution 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 (Gessner et al 2020 Phys. Rev. Lett. 125 100501). 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.
SN  - 1367-2630
UR  - https://arxiv.org/abs/2211.09157
UR  - https://doi.org/10.1088/1367-2630/ad0173
DO  - 10.1088/1367-2630/ad0173
LA  - English
N1  - WOS:001119385500001
ID  - Linowski_etal2023
ER  -