Work

FPGA-Based Adaptive Control for Phase Stabilization in Fiber-Optic Interferometers Using Correlated Photons

Year: 2025

Type: preprint

Abstract: Time-bin encoded photon pairs enable robust, decoherence-resistant transmission through optical fibers for long-distance quantum communication, where phase noise poses a critical limitation to stable operation. Here, we implement an adaptive Perturbation-and-Observe algorithm on a fully digital FPGA platform operating with real-time feedback at 1 Hz. The control signal is derived from the coincidence counts of correlated photon pairs. This adaptive approach reduces the rise time by 70\% and the coincidence noise by 30\%, resulting in visibility improvements sustained for more than 600 s.These results provide an efficient solution for long-term phase stabilization in quantum and photonic systems.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2510.23572

Authors: Berto, P. M., CampodÓnico, F., Matoso, A. A., Vergara, S., Coelho, P. A., Lima, G., PÁdua, S., CariÑe, J.

Institutions: Universidade Federal de Minas Gerais, Universidad Católica de la Santísima Concepción, San Sebastián University, University of Concepción

Topic: Quantum Information and Cryptography

Subfield: Artificial Intelligence

Field: Computer Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W7101912129

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