Exciting idea for achieving reliable ground-based high-rate (10^13 qubits/sec) quantum communication over continental scales (10^4 km) using currently feasible technology (vacuum beam guides). arxiv.org/abs/2312.09372

Vacuum Beam Guide for Large-Scale Quantum Networks

The vacuum beam guide (VBG) presents a completely different solution for quantum channels to overcome the limitations of existing fiber and satellite technologies for long-distance quantum...

This idea is amazing, but am I missing something here? It needs a vacuum tube along the entire length? Could this be accomplished with hollow-core fiber?