Picosecond Wireless Synchronization with Entangled Photons via Grid-Based Quantum Coverage in Indoor Optical Systems

• URL: http://arxiv.org/abs/2510.20885v1
• Date: Thu, 23 Oct 2025 17:49:46 GMT
• Title: Picosecond Wireless Synchronization with Entangled Photons via Grid-Based Quantum Coverage in Indoor Optical Systems
• Authors: Hossein Safi, Mohammad Taghi Dabiri, Mazen Hasna, Iman Tavakkolnia, Harald Haas,
• Abstract summary: We propose a novel entanglement-assisted synchronization framework for indoor optical wireless systems based on grid-based beam steering.<n>A two-stage synchronization algorithm is developed to address the inherent sparsity and randomness of photon detection.<n>Results show that finer grid configurations and optimal photon-pair rates significantly reduce synchronization error.
• Score: 12.035454349591085
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this paper, we propose a novel entanglement-assisted synchronization framework for indoor optical wireless systems based on grid-based beam steering. A central transmitter equipped with a spontaneous parametric down-conversion (SPDC) source emits time-energy entangled photon pairs, directing user photons toward spatially defined grids based on estimated user positions, while retaining reference photons for timestamping. The room is partitioned into multiple beam-aligned regions, and photon reception probability is analytically modeled using local coordinate transformations and Gaussian beam optics. To address the inherent sparsity and randomness of photon detection, we develop a robust two-stage synchronization algorithm that performs sparse bit-pattern matching and timestamp averaging to estimate timing offsets. Monte Carlo simulations are then performed to evaluate the impact of synchronization duration, grid resolution, and photon-pair generation rate on synchronization accuracy. Results show that finer grid configurations and optimal photon-pair rates significantly reduce synchronization error, achieving sub-10 ps timing accuracy within 1 ms of synchronization time. The proposed approach enables scalable, high-precision quantum synchronization in wireless indoor environments, laying the groundwork for future joint quantum communication, sensing, and positioning systems.

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