Diamond Waveguides Preserve Quantum States Over Distance: Toward Secure Port-to-Port Logistics Communication

In mid-April 2014, research groups reported improved coherence and reduced loss in diamond-based optical waveguides. By engineering waveguide geometries and surface coatings, they preserved quantum states over longer distances and minimized decoherence when routing photons through these solid-state structures.

For logistics environments—such as from container stacks to scanning checkpoints or between warehouse nodes—waveguides that preserve quantum coherence are necessary to carry encrypted signals or quantum control data. This work brought quantum photonics one step closer to integration with the industrial fiber and interconnect systems ubiquitous in logistics infrastructure.