Group Seminar 2021/22

  • Date:
  • Time: 10:00-11:00
  • Location: Zoom
  • Speaker: Dr Ai Yamakage
  • Institution: Department of Physics, Nagoya University, Japan
  • Title: Current status and perspective of Majorana fermions on topological superconductors

Abstract:

Majorana fermion is a long-sought particle in Physics. It is chargeneutral and own antiparticle. Surprisingly, they may emerge innontrivial materials such as fractional quantum Hall systems, spinliquids, and topological superconductors/superfluids as gapless modesbound on the surface.One characteristic quantum phenomenon in the emergent Majorana fermionliving in low-dimensional material is nonabelian statistics of particleexchange. It is a fundamental question to establish a candidate materialhosting Majorana fermions and derive exotic quantum phenomena from thenonabelian nature.Unfortunately, there have been few candidates for topologicalsuperconductors. In this seminar, I will talk about the current statusof exploring candidate materials and perspectives for observation ofMajorana physics. First, I explain a Majorana fermion at the ends of asuperconducting nanowire under a magnetic field, which has attractedmuch attention but has been still under debate. Second,time-reversal-invariant bulk topological superconductors and Majoranafermions on their surfaces. Third, I would like to discuss how tomeasure nonabelian statistics of the braiding Majorana fermions.Finally, I show our recent results on a fundamental theory towardobservation and control of Majorana fermions by external electromagneticfields, including strains/rotations.

Meeting ID: 857 4715 9197

Passcode: @#mAk0