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Spatially programmable spin interactions in neutral atom arrays

Lea-Marina Steinert, Philip Osterholz, Robin Eberhard, Lorenzo Festa, Nikolaus Lorenz, Zaijun Chen, A. Trautmann, Christian Groß

Published Jun 24, 2022• 1 citation
Publisher

Abstract

Data and code for the publication "Spatially programmable spin interactions in neutral atom arrays"
DOI
10.5281/zenodo.6906496

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Neutral atom arrays recently emerged as one the leading platforms for large-scale quantum computing and simulations [1, 2]. These systems offer a variety of possible qubit encodings with long coherence times along with exceptional programmability and reconfigurability of the array geometry and qubit connectivity. In addition, strong, highly coherent coupling between the qubits can be achieved using Rydberg states of the atoms. QuEra provides a cloud-accessible, programmable 256-qubit quantum simulator based on a two-dimensional array of Rubidium-87 atoms in reconfigurable optical tweezers.
Neutral atom arrays, particularly the reconfigurable field programmable qubit arrays (FPQA) with atom movement, show strong promise for quantum computing. FPQA has a dynamic qubit connectivity, facilitating cost-effective execution of long-range gates, but it also poses new challenges in the compilation. Inspired by the FPGA compilation strategy, we develop a router, Q-Pilot, that leverages flying ancillas to implement 2-Q gates between data qubits mapped to fixed atoms. Equipped with domain-specific routing techniques, Q-Pilot achieves 1.4×, 27.7×, and 6.7× reductions in circuit depth for 100-qubit random, quantum simulation, and QAOA circuits, respectively, compared to alternative fixed atom array architectures.