German incumbent Deutsche Telekom is going to great lengths to demonstrate its quantum networking prowess.
82 kilometres, in fact. That's the distance at which its T-Labs unit, together with quantum networking hardware provider Qunnect, was able to dynamically route so-called polarisation-entangled photons, or qubits, over multiple paths at fidelities of more than 92% in parallel with traditional data traffic.
That's a lot of technical jargon, but the salient points are that DT sent quantum data down the same fibre that can be used for regular data traffic at a record-breaking distance while maintaining a very high degree of data integrity.
In a separate field experiment, DT and Qunnect distributed polarisation-entangled photons over a 30 km fibre route for 17 days at 99% fidelity.
