One of the most important multipartite entangled states, Greenberger-Horne-Zeilinger state (GHZ), serves as a fundamental resource for quantum foundation test, quantum communication and quantum computation. To increase the number of entangled particles, significant experimental efforts should been invested due to the complexity of optical setup and the difficulty in maintaining the coherence condition for high-fidelity GHZ state. Here, we propose an ultra-integrated scalable on-chip GHZ state generation scheme based on frequency combs. By designing several microrings pumped by different lasers, multiple partially overlapped quantum frequency combs are generated to supply as the basis for on-chip polarization-encoded GHZ state with each qubit occupying a certain spectral mode. Both even and odd numbers of GHZ states can be engineered with constant small number of integrated components and easily scaled up on the same chip by only adjusting one of the pump wavelengths. In addition, we give the on-chip design of projection measurement for characterizing GHZ states and show the reconfigurability of the state. Our proposal is rather simple and feasible within the existing fabrication technologies and we believe it will boost the development of multiphoton technologies.

Greenberger-Horne-Zeilinger态（GHZ）是最重要的多方纠缠态之一，它是量子基础测试，量子通信和量子计算的基础资源。为了增加纠缠粒子的数量，由于光学装置的复杂性和维持高保真GHZ状态的相干条件的困难，应该投入大量的实验工作。在这里，我们提出了一种基于频率梳的超集成可扩展片上GHZ状态生成方案。通过设计由不同激光器泵浦的几个微环，可以生成多个部分重叠的量子频率梳，以作为片上偏振编码GHZ状态的基础，每个量子位都占据一定的光谱模式。GHZ状态的偶数和奇数状态都可以使用恒定数量的集成组件进行设计，并且只需调整泵浦波长之一就可以轻松地在同一芯片上按比例放大。此外，我们给出了用于表征GHZ状态的投影测量的片上设计，并显示了该状态的可重构性。我们的建议在现有制造技术中相当简单可行，我们相信它将推动多光子技术的发展。