A team of researchers from the Humboldt-Universität zu Berlin and the Ferdinand-Braun-Institut has succeeded in generating photons with stable frequencies emitted from quantum light sources.

“Diamond material is of great importance for future technologies such as the quantum internet,” said senior author Professor Tim Schröder from the Humboldt-Universität zu Berlin and his colleagues.

“Special defect centers can be used as qubits and emit single light particles that are referred to as single photons.”

“To enable data transmission with feasible communication rates over long distances in a quantum network, all photons must be collected in optical fibers and transmitted without being lost.”

“It must also be ensured that these photons all have the same color, i.e., the same frequency.”

“Fulfilling these requirements has been impossible — until now.”

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