Sergej Moroz: Quantum dynamics at a Kramers-Wannier dual interface

Abstract: I will present our on-going work on quantum time evolution after a local quench at an interface between paramagnetic and ferromagnetic regions of a transverse field Isingmodel. The two regions are related by the Kramers-Wannier duality and thus support elementary excitations with the same energy dispersion but different physical nature. For open chain geometry a novel symmetry appears, a combination of the Kramers-Wannier transformation and a reflection, which squares to the Ising Z_2 symmetry. I will also present our first numerical results of time evolution at the interface.

Sergej Moroz, Karlstad University