Many photons are better than one for advancing quantum technologies

https://phys.org/news/2023-12-photons-advancing-quantum-technologies.html

"non-Fock states (iNFS): complex quantum states requiring more than single photon source and linear optical elements... Fourier transform photonic quantum circuit manifesting 2 photons in 3 different pathways achieving conditional coherence... iNFS properties do not change when passing through a network of many linear optical elements... long-distance optical quantum cryptography, optical quantum computers and sensing"