Srinivas Raghu

Princeton University

Direct analogs of quantum Hall effect edge states in photonic systems

The quantum Hall effect (QHE) is usually associated with an incompressible fluid of fermions in externally applied magnetic fields. Both the magnetic field - which gives rise to Landau quantization, and the fermionic nature of the electrons - which gives rise to incompressibility, seem to play crucial roles here. Nonetheless, in this talk, I will show how the physics of "chiral" QHE edge modes can be transcribed to photonic systems, where the degrees of freedom are neutral bosons.  The photonic analogs of QHE edge states described here form channels that permit light to propagate along one direction only.