One-photon communication in atomic media

We consider the problem of single-photon transmission through an atomic medium, using quantum channel fidelity to describe the resulting information loss. We find that the normalized fidelity decreases monotonically with coupling strength, establishing a performance bound for quantum communication through such media. Our results hold for several channel types and for deterministic and random media. --- Source: arXiv:2605.22797v1 - http://arxiv.org/abs/2605.22797v1 PDF: https://arxiv.org/pdf/2605...