Quantum Teleportation Breakthrough: State Swapped Between Photons From Two Remote Independent Sources

By Eugene@BreakingNews4𝕏

Researchers have achieved a major milestone in quantum networking by successfully teleporting a photonic quantum state between photons emitted from two completely independent, distant semiconductor quantum dot sources—without any prior shared entanglement between the dots themselves.

In standard quantum teleportation, entanglement is pre-shared between sender and receiver. Here, two remote GaAs quantum dots—one generating the qubit to teleport, the other producing an entangled photon pair—were linked only through a Bell-state measurement. Polarization-preserving quantum frequency converters shifted the near-infrared photons to telecom wavelengths, enabling high-visibility two-photon interference essential for the protocol.

The team demonstrated all-photonic teleportation with average fidelity exceeding the classical limit, proving the state was faithfully transferred onto the distant photon. This “device-independent” approach eliminates the need for direct entanglement distribution between solid-state nodes, a longtime bottleneck for scalable quantum repeaters and networks.

By interfacing dissimilar quantum emitters over telecom fiber-compatible wavelengths, the experiment paves the way for plug-and-play quantum nodes using deterministic single-photon sources. Applications include secure long-distance quantum communication, distributed quantum computing, and hybrid networks combining matter qubits with flying photonic links.

“This is a key step toward practical quantum networks built from independent, on-demand light sources,” the researchers note, with future work targeting higher rates and longer distances.

Sources

• Nature Communications. “Telecom-wavelength quantum teleportation using frequency-converted photons from remote quantum dots.” https://www.nature.com/articles/s41467-025-65912-8

• Nature Communications. “Quantum teleportation with dissimilar quantum dots over a hybrid quantum network.” https://www.nature.com/articles/s41467-025-65911-9