Compiler Framework for Directional Transport in Zoned Neutral Atom Systems with AOD Assistance: A Hybrid Remote CZ Approach

2026-04-13

AI Summary

This work addresses the bottleneck in generating long-range entanglement in neutral-atom arrays, which arises from limitations of acousto-optic deflector (AOD) shuttling—namely, non-crossing row-column constraints, finite transport speed, and restricted operational range. To overcome this, the authors propose a hybrid remote controlled-Z (CZ) gate scheme that employs directional transport as the primary mechanism for long-range entanglement, augmented by AOD assistance for channel establishment and fine-tuning. Under anti-blocking conditions, the protocol utilizes detuning-modulated π-pulse sequences to directionally shuttle Rydberg excitations along resettable auxiliary channels, enabling high-fidelity CZ gates between non-adjacent stationary qubits. Compared to a purely AOD-based baseline, this approach reduces entangling time by 50%–90% and supports beyond-diffraction-limit, over-the-horizon connectivity exceeding the physical constraints of optical objectives.

Technology Category

• Search and Optimization: Mixed Discrete/Continuous Search
• Machine Learning: Quantum Machine Learning
• Planning, Routing, and Scheduling: Optimization of Spatio-temporal Systems

Application Category

• Economics, Online Markets and Human Computation: LLM based quality controls for crowd work
• Security and Privacy: Large-scale security measurements
• Responsible Web: Data and user privacy-enhancing technologies for the Web

Abstract

We present a directional-transport (DT)-based remote CZ gate and compiler for zoned neutral-atom arrays that overcomes movement-bound entanglement limitations. Current AOD-based shuttling faces row/column non-crossing constraints, device-speed limits, and hardware-restricted range - bottlenecks for long-distance connectivity. Our approach reserves AODs for channel setup and micro-tuning while making DT the default for remote entanglement. Under antiblockade, a detuning-modulated pi-pulse sequence drives directional transport of a Rydberg excitation along a dynamic and resettable ancilla corridor, realizing a CZ gate between stationary, non-adjacent qubits. This cuts entangling-stage duration by approximately 50 to 90 percent versus AOD-only baselines and enables long-distance connectivity beyond objective-limited shuttling.

Problem

• directional transport
• neutral atom arrays
• remote entanglement
• AOD shuttling
• long-distance connectivity

Innovation

• Directional Transport
• Remote CZ Gate
• Neutral Atom Arrays
• AOD Assistance
• Rydberg Excitation