近日，清华大学刘永椿团队报道了在晶格自旋系统中产生大规模的类格林伯格-霍恩-蔡林格态。2026年2月24日出版的《物理评论A》杂志发表了这项成果。

格林伯格-霍恩-蔡林格态是典型的量子最大纠缠态，在基础研究和新兴量子技术中均备受关注。在晶格自旋系统中制备大规模GHZ态对实现量子优势具有特殊吸引力，但传统方案在可扩展性方面面临巨大挑战。

研究组提出了一种通过全局Floquet工程在晶格自旋系统中生成大规模类GHZ态的普适且可扩展的方案，该类GHZ态与标准GHZ态具有相似的纠缠特性和计量学性能。该方案仅需全局操作，在粒子数增大时展现显著优势，适用于任意相互作用范围的系统，为在各类体系中大规模实现多体纠缠态提供了可行路径。

附：英文原文

Title: Generating large-scale Greenberger-Horne-Zeilinger–like states in lattice spin systems

Author: Xuanchen Zhang, Yaofeng Chen, Yong-Chun Liu

Issue&Volume: 2026/02/24

Abstract: The Greenberger-Horne-Zeilinger (GHZ) state is a typical maximally entangled state which is pursued in both fundamental research and emerging quantum technologies. Preparing large-scale GHZ states in lattice spin systems is particularly appealing for quantum advantages, but conventional schemes face great challenges in scalability. Here we propose a universal and scalable scheme to generate large-scale GHZ-like states, which share similar entanglement and metrological properties with standard GHZ states, in lattice spin systems through global Floquet engineering. Our scheme requires only global operations and shows great advantages for large particle number. It is applicable to systems with arbitrary interaction ranges, offering a practical pathway for large-scale implementation of many-body entangled states in various systems.

DOI: 10.1103/nt1d-76lq

Source: https://journals.aps.org/pra/abstract/10.1103/nt1d-76lq