Simulation and Manipulation of Tunable Weyl-Semimetal Bands Using Superconducting Quantum Circuits.
Simulation and Manipulation of Tunable Weyl-Semimetal Bands Using Superconducting Quantum Circuits.
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DOI：
10.1103/physrevlett.122.010501
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发表时间：
2018-02
影响因子：
8.6
通讯作者：
Xinsheng Tan;Yuxin Zhao;Qiang Liu;G. Xue;Haifeng Yu;Zidan Wang;Yang Yu
中科院分区：
文献类型：
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作者：
Xinsheng Tan;Yuxin Zhao;Qiang Liu;G. Xue;Haifeng Yu;Zidan Wang;Yang Yu
我们用超导量子电路模拟了高度可调的外尔半金属带。用微波场驱动超导量子电路，将晶格的动量空间映射到参数空间，实现了外尔半金属的哈密顿量。通过测量能谱，我们直接成像的Weyl点，其拓扑缠绕数进一步确定的Berry曲率测量。此外，我们还通过外加抽运微波场来调控能带结构，在外加人工磁场的情况下产生动量相关的Weyl点能，这对于在某些特殊的Weyl半金属中产生手征磁拓扑流是必不可少的，可能对拓扑物理产生重大影响.
We simulated highly tunable Weyl-semimetal bands using superconducting quantum circuits. Driving the superconducting quantum circuits with microwave fields, we mapped the momentum space of a lattice to the parameter space, realizing the Hamiltonian of a Weyl semimetal. By measuring the energy spectrum, we directly imaged the Weyl points, whose topological winding numbers were further determined from the Berry curvature measurement. In addition, we manipulated the band structure with an additional pump microwave field, producing a momentum-dependent Weyl-point energy together with an artificial magnetic field, which are indispensable for generating chiral magnetic topological currents in some special Weyl semimetals and may have significant impact on topological physics.