浙江大學王大偉、王浩華和宋超研究小組最近研究觀察了光的量子拓撲。2022年12月2日出版的《科學》雜志發表了這項成果。

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本文在超導電路中對量子化光的拓撲態進行了實驗，構建出一維和二維Fock態晶格，實現了包括Su-Schrieffer-Heeger(SSH)模型、應變誘導的贗朗道能級、谷霍爾效應以及Haldane手性邊緣電流在內的拓撲物理學。他們的研究將光的拓撲態擴展到量子體系，將凝聚態物質物理學的拓撲相態與電路量子電動力學連接起來，提供手段自由調控多種諧振器的量子態。

據介紹，拓撲光子學為探索傳統電子材料之外的拓撲物理提供了一個強大的平臺，并在光傳輸和激光方面顯示出廣闊的應用前景。經典自由度通常被用來構建真實或合成維度的拓撲光模式。除了經典的拓撲結構，光的固有量子性質提供了大量根本上不同的拓撲狀態。

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

來源：科學網 小柯機器人

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