Recently, two demonstrations of quantum teleportation were published in Nature: 'Quantum teleportation with independent sources and prior entanglement distribution over a network' by Qi-Chao Sun et al (arXiv preprint) 'Quantum teleportation across a metropolitan fibre network' by Valivarthi et al (arXiv preprint) I want to talk about a difference between the two. In the Valivarthi et al paper, the