Deterministic GKP state generation in programmable photonic cavities

Deterministic GKP state generation in programmable photonic cavities

Seminar author:Javi Lalueza

Event date and time:04/22/2026 02:30:pm

Event location:GIQ Seminar Room

Event contact:

We propose a deterministic protocol to generate large-photon-number GKP states with high fidelities using a programmable photonic circuit composed of squeezing, displacement, and Kerr non-linearity gates. We benchmark the performance of our protocol under realistic experimental imperfections, such as imperfect control of the Kerr non-linearity and photon loss, identifying the former as the dominant limitation under current experimental conditions. Finally, we evaluate the performance of the generated GKP code under photon loss by calculating the near-optimal channel fidelity. Our results provide a route towards scalable generation of GKP states.