浙江大学王大伟、王浩华和宋超研究小组最近研究观察了光的量子拓扑。2022年12月2日出版的《科学》杂志发表了这项成果。

本文在超导电路中对量子化光的拓扑态进行了实验，构建出一维和二维Fock态晶格，实现了包括Su-Schrieffer-Heeger(SSH)模型、应变诱导的赝朗道能级、谷霍尔效应以及Haldane手性边缘电流在内的拓扑物理学。他们的研究将光的拓扑态扩展到量子体系，将凝聚态物质物理学的拓扑相态与电路量子电动力学连接起来，提供手段自由调控多种谐振器的量子态。

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据介绍，拓扑光子学为探索传统电子材料之外的拓扑物理提供了一个强大的平台，并在光传输和激光方面显示出广阔的应用前景。经典自由度通常被用来构建真实或合成维度的拓扑光模式。除了经典的拓扑结构，光的固有量子性质提供了大量根本上不同的拓扑状态。

附：英文原文

Title: Observing the quantum topology of light

Author: Jinfeng Deng, Hang Dong, Chuanyu Zhang, Yaozu Wu, Jiale Yuan, Xuhao Zhu, Feitong Jin, Hekang Li, Zhen Wang, Han Cai, Chao Song, H. Wang, J. Q. You, Da-Wei Wang

Issue&Volume: 2022-12-02

Abstract: Topological photonics provides a powerful platform to explore topological physics beyond traditional electronic materials and shows promising applications in light transport and lasers. Classical degrees of freedom are routinely used to construct topological light modes in real or synthetic dimensions. Beyond the classical topology, the inherent quantum nature of light provides a wealth of fundamentally distinct topological states. Here we implement experiments on topological states of quantized light in a superconducting circuit, with which one- and two-dimensional Fock-state lattices are constructed. We realize rich topological physics including topological zero-energy states of the Su-Schrieffer-Heeger model, strain-induced pseudo-Landau levels, valley Hall effect, and Haldane chiral edge currents. Our study extends the topological states of light to the quantum regime, bridging topological phases of condensed-matter physics with circuit quantum electrodynamics, and offers a freedom in controlling the quantum states of multiple resonators.

DOI: ade6219

Source: https://www.science.org/doi/10.1126/science.ade6219

来源：科学网 小柯机器人

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