Approaching capacity limits in photon-starved noisy optical communication
Marcin Jarzyna, Ludwig Kunz, Michał Jachura, Konrad Banaszek · 2023
We show that utilizing pulse position modulation and photon number resolving detectors together with techniques such as quantum pulse gating allows to approach ultimate quantum limit on optical communication capacity in the presence of background noise in the weak output power regime. This shows that for communication over long distances by means of current existing technology it is possible to attain optimal performance, limited only by laws of quantum mechanics.