Telecom-wavelength quantum teleportation using photons from remote quantum dots
a day ago
- #quantum teleportation
- #quantum communication
- #semiconductor quantum dots
- Demonstration of full-photonic quantum teleportation using semiconductor quantum dots (QDs) emitting at near-infrared wavelengths.
- Use of two remote GaAs quantum dots: one as an entangled-photon pair source and the other as a single-photon source.
- Teleportation achieved by interfacing a single photon with the biexciton emission of an entangled pair via a polarization-selective Bell state measurement.
- Frequency mismatch between sources erased using polarization-preserving quantum frequency converters, enabling remote two-photon interference at telecom wavelengths.
- Achieved a post-selected teleportation fidelity of 0.721(33), significantly above the classical limit, proving successful quantum teleportation between distinct sources.
- Key factors for success include high entanglement fidelity, photon indistinguishability, and preservation of quantum states during frequency conversion.
- Potential for future improvements with optimized QD designs, such as reduced fine-structure splitting and enhanced two-photon interference visibility.
- Highlights the maturity of QD-based technology for quantum communication applications, including entanglement swapping and quantum networks.