Entanglement and interaction in a topological quantum walk

Alberto Verga (1, 2) , Ricardo Gabriel Elias (3)

1 CPT - Centre de Physique Théorique - UMR 7332
2 CPT - E6 Nanophysique
3 UCHILE - Universidad de Chile = University of Chile [Santiago]

We study the quantum walk of two interacting particles on a line with an interface separating two topologically distinct regions. The interaction induces a localization-delocalization transition of the edge state at the interface. We characterize the transition through the entanglement between the two particles.

Domaines: Physique Quantique [quant-ph]; Systèmes mésoscopiques et effet Hall quantique [cond-mat.mes-hall]

Alberto Verga, Ricardo Gabriel Elias. Entanglement and interaction in a topological quantum walk. SciPost Physics, 2018, 5 (2), pp.019. ⟨10.21468/SciPostPhys.5.2.019⟩. ⟨hal-02049694⟩