Joseph Chapman received a B.S. degree in Physics from the University of Illinois at Urbana-Champaign in 2016 where he worked under Paul Kwiat to support their quantum communication projects. He then was granted a PhD in Physics from the University of Illinois at Urbana-Champaign in 2020 where he stayed to experimentally lead Kwiat’s investigation to implement quantum communication in space for NASA. In 2017, he was awarded the competitive National Defense Science and Engineering Graduate Fellowship by the Department of Defense. In 2019, he was awarded the Donald and Shirley Jones Fellowship for outstanding graduate students by his department. His current research at ORNL focuses on quantum network hardware development. He is a member of Optica (formerly the Optical Society of America) and the International Society for Optics and Photonics (SPIE). He is also a regular reviewer for the Physical Review and Optica families of journals.
Presentation Title:
Real-time Heralded Resource-State for Non-Gaussian Teleportation
Presentation Abstract:
Quantum teleportation is fundamental to certain quantum repeaters enabling long-distance quantum communication. For continuous-variables, specifically, non-Gaussian entanglement resources have been theorized to improve teleportation fidelity compared to Gaussian squeezed vacuum. For use in non-Gaussian teleportation, we demonstrate a heralded two-mode resource state capable of real-time use. We characterize this state with two-mode homodyne tomography and show it has fidelity as high as 97% with the expected resource state. Real-time use is enabled by a master system doing live coincidence detection and outputting low-jitter and low-latency heralding signals. Photon-subtracted real-time quadrature measurement is enabled by the development of a synchronized homodyne detection server which the master system can query to collect the quadrature samples corresponding to heralded state. Furthermore, we present a design including these advances for full experimental demonstration of non-Gaussian teleportation. These results demonstrate significant advancement in enabling the use of heralded non-Gaussian states in quantum networking protocols.