Affordable Access

Publisher Website

Quantum Quenches in Chern Insulators

Authors
  • Caio, M. D.
  • Cooper, N. R.
  • Bhaseen, M. J.
Type
Published Article
Publication Date
Apr 08, 2015
Submission Date
Apr 08, 2015
Identifiers
DOI: 10.1103/PhysRevLett.115.236403
Source
arXiv
License
Yellow
External links

Abstract

We explore the non-equilibrium response of Chern insulators. Focusing on the Haldane model, we study the dynamics induced by quantum quenches between topological and non-topological phases. A notable feature is that the Chern number, calculated for an infinite system, is unchanged under the dynamics following such a quench. However, in finite geometries, the initial and final Hamiltonians are distinguished by the presence or absence of edge modes. We study the edge excitations and describe their impact on the experimentally-observable edge currents and magnetization. We show that, following a quantum quench, the edge currents relax towards new equilibrium values, and that there is light-cone spreading of the currents into the interior of the sample.

Report this publication

Statistics

Seen <100 times