2018/02/28 by Xinsheng Tan, Yuxin Zhao, Y. X. Zhao +6
Materials Science · Physics and Astronomy · #Band gap #Berry connection and curvature #Condensed matter physics #Graphene research and applications #Hamiltonian (control theory) #Magnetic field #Physics #Position and momentum space #Quantum #Quantum and electron transport phenomena #Quantum mechanics #Semimetal #Superconductivity #Topological Materials and Phenomena #Topology (electrical circuits) #Weyl semimetal #cond-mat.mes-hall #cond-mat.mtrl-sci #cond-mat.other #quant-ph
paper · pdf · doi:10.1103/physrevlett.122.010501
published as Phys. Rev. Lett. 122, 010501 (2019)
openalex created_date 2018/03/06 · arxiv created 2018/03/12 · openalex publication_date 2019/01/08 · arxiv updated 2019/01/16 · openalex updated_date 2026/08/05
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.