On-demand generation of entangled photon pairs with near-unity fidelity

Michael E. Reimer

doi:10.1117/12.2641725

19 July 2022 On-demand generation of entangled photon pairs with near-unity fidelity

Michael E. Reimer

Proceedings Volume PC12243, Photonics for Quantum 2022; PC122430Z (2022) https://doi.org/10.1117/12.2641725
Event: Photonics for Quantum, 2022, Rochester, NY, United States

Abstract

Entanglement is an essential resource for secure communication, quantum networks, quantum computing and quantum sensing. However, the leading photon technology to generate entangled photon pairs is based on probabilistic approaches such as spontaneous parametric down-conversion (SPDC) in a non-linear crystal. Here, we overcome this limitation and generate entangled photons on-demand with near-unity fidelity using quantum dots in photonic nanowire devices. We show that by minimizing dephasing processes in the quantum dot and using a fast detection system with precise timing resolution (<20 ps), the entanglement fidelity approaches unity. Finally, we will present a viable route to reaching pair-extraction efficiencies that are two orders of magnitude brighter than SPDC sources without degrading the entanglement fidelity. Such high extraction efficiencies will lead to enhanced secure key rates, longer distance quantum communication, and faster quantum computation.

Conference Presentation

Citation Download Citation

Michael E. Reimer "On-demand generation of entangled photon pairs with near-unity fidelity", Proc. SPIE PC12243, Photonics for Quantum 2022, PC122430Z (19 July 2022); https://doi.org/10.1117/12.2641725

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