Direct imaging of topological edge states in cold-atom systems - Archive ouverte HAL
Article Dans Une Revue Proceedings of the National Academy of Sciences of the United States of America Année : 2013

Direct imaging of topological edge states in cold-atom systems

Fabrice Gerbier
N. Goldman
  • Fonction : Auteur
J. Dalibard
A. Dauphin
  • Fonction : Auteur
M. Lewenstein
  • Fonction : Auteur
P. Zoller
  • Fonction : Auteur
I. B. Spielman
  • Fonction : Auteur

Résumé

Detecting topological order in cold-atom experiments is an ongoing challenge, the resolution of which offers novel perspectives on topological matter. In material systems, unambiguous signatures of topological order exist for topological insulators and quantum Hall devices. In quantum Hall systems, the quantized conductivity and the associated robust propagating edge modes - guaranteed by the existence of non-trivial topological invariants - have been observed through transport and spectroscopy measurements. Here, we show that optical-lattice-based experiments can be tailored to directly visualize the propagation of topological edge modes. Our method is rooted in the unique capability for initially shaping the atomic gas, and imaging its time-evolution after suddenly removing the shaping potentials. Our scheme, applicable to an assortment of atomic topological phases, provides a method for imaging the dynamics of topological edge modes, directly revealing their angular velocity and spin structure.

Dates et versions

hal-03363337 , version 1 (03-10-2021)

Identifiants

Citer

Fabrice Gerbier, N. Goldman, J. Dalibard, A. Dauphin, M. Lewenstein, et al.. Direct imaging of topological edge states in cold-atom systems. Proceedings of the National Academy of Sciences of the United States of America, 2013, 110 (17), pp.6736-6741. ⟨10.1073/pnas.1300170110⟩. ⟨hal-03363337⟩
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