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IQUIST Young Researchers Seminar: "Faithful quantum teleportation via a nanophotonic nonlinear Bell state analyzer," Joshua Akin, Fang Group
- Event Type
- Seminar/Symposium
- Sponsor
- IQUIST
- Location
- 190 Engineering Sciences Building, 1101 W Springfield Ave, Urbana, IL 61801
- Date
- Oct 8, 2025 11:00 - 11:50 am
- Speaker
- Joshua Akin, Fang Group
- Contact
- Kejie Fang
- kfang3@illinois.edu
- Phone
- 217-300-6765
- Views
- 43
- Originating Calendar
- IQUIST Young Researchers Seminar
Abstract: Quantum teleportation and entanglement swapping utilize a linear optical Bell state measurement to herald successful operations. However, linear elements constrain the system by requiring indistinguishable photons and thus are vulnerable to multi-photon errors. Here we demonstrate a nonlinear Bell state analyzer utilizing the high nonlinearity of our indium gallium phosphide platform in a nanophotonic resonator. The efficient sum-frequency generation process allows spectrally distinguishable inputs and filters multi-photon events. We demonstrate performance down to the single-photon level and achieve fidelities more than 94 %. Our result demonstrates faithful quantum information protocols with spectrally distinguishable photons and no fundamental limit of fidelity.
Bio: Josh Akin is a 4th year ECE Ph.D. student in Kejie Fang’s group researching nonlinear quantum optics and information processing.