2019/04/30 by John Stenger, John P. T. Stenger, David Pekker
Materials Science · Mathematics · Physics and Astronomy · #Condensed matter physics #Geometry #Graphene research and applications #MAJORANA #Mathematics #Parameter space #Perturbation (astronomy) #Physics #Quantum #Quantum computer #Quantum dot #Quantum many-body systems #Quantum mechanics #Semiconductor #Superconductivity #Topological Materials and Phenomena #Zero-point energy #cond-mat.mes-hall #cond-mat.str-el
paper · pdf · doi:10.1103/physrevb.100.035420
published as Phys. Rev. B 100, 035420 (2019)
openalex publication_date 2019/07/15 · arxiv created 2019/07/16 · arxiv updated 2019/07/24 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
As an analogy to the Weyl point in k-space, we search for energy levels which close at a single point as a function of a three-dimensional parameter space. Such points are topologically protected in the sense that any perturbation which acts on the two-level subsystem can be corrected by tuning the control parameters. We find that parameter-controlled Weyl points are ubiquitous in semiconductor-superconductor quantum dots and that they are deeply related to Majorana zero modes. In this paper, we present several semiconductor-superconductor quantum-dot devices which host parameter-controlled Weyl points. Furthermore, we show how these points can be observed experimentally via conductance measurements.