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Thu, 01-12-2022, 18:30 Uhr

Topological Insulators and Superconductors

Prof. Dr. Yoichi Ando
II. Physikalisches Institut der Universität Köln
(nur online) vollständiger Text


Topological insulators and superconductors are new quantum states of matter that are characterized by nontrivial topological structures of the Hilbert space. Recently, they attract a lot of attention because of the appearance of exotic quasiparticles such as spin-momentum-locked Dirac fermions or Majorana fermions on their edge/surface, which hold promise for various novel applications. In particular, localized Majorana zero modes are expected to obey non-Abelian statistics and enable topological quantum computing. In this colloquium, I will introduce the basics of these materials and present some of the contributions we have made in this new frontier. In addition, I will discuss how one can conceive to build topological qubits based on Majorana zero modes and demonstrate the non-Abelian statistics.