Quantum teleportation using a light-emitting diode

Abstract

Teleportation of optical qubits can enable reliable logic operations in massively parallel quantum computers, as well as the formation of secure quantum networks. Photon teleportation has previously used laser-generated entangled photons created in random quantities. However, the practical complexities of the generating scheme coupled with errors caused by multipair emission have complicated its deployment in useful quantum information technology. Here, we demonstrate teleportation of single photonic qubits, mediated by individual pairs of entangled photons generated by an electrically driven entangled light source realized by embedding a single semiconductor quantum dot within a light-emitting diode. Teleportation is achieved with six general input states, with asymmetrically distributed fidelities, and an average fidelity above the limit possible with classical light. A theoretical framework is created that reproduces our experiments with close agreement. The unique sub-Poissonian nature of our photonic teleporter together with its electrical operation will help lift the complexity restriction of future quantum information applications.

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Figure 1: Experimental set-up and ELED characteristics.
Figure 2: Third-order intensity correlations g(3) for antidiagonal polarized control photon Ac.
Figure 3: Fidelity of teleported qubits.

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Acknowledgements

The authors acknowledge partial financial support through the European Union Initial Training Network Spin Effects for Quantum Optoelectronics (SPIN-OPTRONICS) and the Seventh Framework Programme Future and Emerging Technologies Collaborative Project Quantum Interfaces, Sensors and Communication Based on Entanglement (Q-ESSENCE), the United Kingdom Engineering and Physical Sciences Research Council and the Cambridge Overseas Trust. The authors also thank T. Rudolph for useful discussions.

Author information

Samples were grown by I.F. and D.A.R. and processed by J.S.-S., C.L.S. and J.N. Optical measurements were carried out by J.N. and R.M.S. Calculations were performed by K.C.A.C and M.L. A.J.S. guided the work. All authors discussed the experiments, results and the interpretation of the results. R.M.S., J.N., K.C.A.C. and M.L. wrote the manuscript, with contributions from the other authors.

Correspondence to R. M. Stevenson or A. J. Shields.

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The authors declare no competing financial interests.

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Nilsson, J., Stevenson, R., Chan, K. et al. Quantum teleportation using a light-emitting diode. Nature Photon 7, 311–315 (2013). https://doi.org/10.1038/nphoton.2013.10

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