We present a modular atom-array quantum computing architecture with space-time hybrid multiplexing (MAQCY), a dynamic optical tweezer-based protocol for fully connected and scalable universal quantum computation. By extending the concept of globally controlled static dual-species Rydberg atom wires [1], we develop an entirely new approach using Q-Pairs, which consist of globally controlled and temporally multiplexed dual-species Rydberg blockaded atom and superatom pairs. Space-time hybrid multiplexing of Q-Pairs achieves O(N) linear scaling in the number of required physical qubits, while preserving coherence and mitigating circuit-depth limitations through in-situ atom replacement. To demonstrate MAQCY's versatility, we implement a three-qubit quantum Fourier transform using only global operations and atom transport. We also propose a concrete implementation using ytterbium isotopes, paving the way toward large-scale, fault-tolerant quantum computing.
@article{arxiv.2510.02940,
title = {MAQCY: Modular Atom-Array Quantum Computing with Space-Time Hybrid Multiplexing},
author = {Andrew Byun and Chanseul Lee and Eunsik Yoon and Minhyuk Kim and Tai Hyun Yoon},
journal= {arXiv preprint arXiv:2510.02940},
year = {2025}
}