Researchers at the Walther-Meißner-Institut (WMI) have just reported on first demonstration experiments using their prototype superconducting QuLAN device (arXiv:2308.12398). Specifically, they have successfully distributed entangled microwave states across a ~6m long cryogenic link and found that the entanglement even survives when the link is heated up to temperatures of about 1 K. This finding will be extremely important for reducing the cooling requirement and associated costs in future quantum networks.
