Compact entanglement sources for portable quantum information platforms

Tiphaine Kouadou; Colin P. Lualdi; Spencer Johnson; Kristina Meier; Josh Aller; Brad Slezak; Tony Roberts; Phil Battle; Paul G. Kwiat

doi:10.1117/12.2609989

1 March 2022 Compact entanglement sources for portable quantum information platforms

Tiphaine Kouadou, Colin P. Lualdi, Spencer Johnson, Kristina Meier, Josh Aller, Brad Slezak, Tony Roberts, Phil Battle, Paul G. Kwiat

Author Affiliations +

Proceedings Volume 12015, Quantum Computing, Communication, and Simulation II; 120150D (2022) https://doi.org/10.1117/12.2609989
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

We discuss two novel entanglement sources utilizing spontaneous parametric downconversion in periodically poled waveguides. Using quasi-phase matched KTP crystals, we have demonstrated a post-selection-based polarization entangled degenerate source at 810 nm, as well as a post-selection-free non-degenerate collinear source producing entangled photons at 810 nm and 1550 nm. The sources exhibit high brightness and state quality – with the non-degenerate source achieving fidelities and purities up to 99% – with clear paths for further improvement. Furthermore, they are compact, stable, and need little alignment when set, critical for practical quantum communication and network applications. Lastly, their small size, weight, and power (SWaP) makes them an attractive option for mobile platforms, e.g., with drones or satellites.

Conference Presentation

Citation Download Citation

Tiphaine Kouadou, Colin P. Lualdi, Spencer Johnson, Kristina Meier, Josh Aller, Brad Slezak, Tony Roberts, Phil Battle, and Paul G. Kwiat "Compact entanglement sources for portable quantum information platforms", Proc. SPIE 12015, Quantum Computing, Communication, and Simulation II, 120150D (1 March 2022); https://doi.org/10.1117/12.2609989

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