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

TL;DR

This paper introduces a hybrid remote CZ gate and compiler for zoned neutral-atom arrays that uses directional transport to improve long-distance connectivity and reduce entangling-stage duration.

Contribution

It proposes a novel approach combining AOD-assisted channel setup with directional transport for efficient remote entanglement in neutral-atom systems.

Findings

Cuts entangling-stage duration by 50-90% compared to AOD-only methods.

Enables long-distance connectivity beyond traditional shuttling limits.

Uses detuning-modulated pi-pulse sequences for directional transport.

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.