Quantum simulation technique yields topological soliton state in SSH model

Using atomic quantum-simulation, an experimental technique involving finely tuned lasers and ultracold atoms about a billion times colder than room temperature to replicate the properties of a topological insulator, a team of researchers has directly observed for the first time the protected boundary state of the topological insulator trans-polyacetylene. The transport properties of this organic polymer are typical of topological insulators and of the Su-Schrieffer-Heeger (SSH) model.

(via WSJ)