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arXiv · 1709.05765

Topological Maxwell Metal Bands in a Superconducting Qutrit

Xinsheng Tan·Dan-Wei Zhang·Qiang Liu·Guangming Xue·Hai-Feng Yu·Yan-Qing Zhu·Hui Yan·Shi-Liang Zhu·Yang Yu
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Abstract

We experimentally explore the topological Maxwell metal bands by mapping the momentum space of condensed-matter models to the tunable parameter space of superconducting quantum circuits. An exotic band structure that is effectively described by the spin-1 Maxwell equations is imaged. Three-fold degenerate points dubbed Maxwell points are observed in the Maxwell metal bands. Moreover, we engineer and observe the topological phase transition from the topological Maxwell metal to a trivial insulator, and report the first experiment to measure the Chern numbers that are higher than one.

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Xinsheng Tan, Dan-Wei Zhang, Qiang Liu, Guangming Xue, Hai-Feng Yu, Yan-Qing Zhu, Hui Yan, Shi-Liang Zhu, Yang Yu. 2017-09-18. Topological Maxwell Metal Bands in a Superconducting Qutrit. https://doi.org/10.1103/physrevlett.120.130503

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