Quantum walks are processes that model dynamics in coherent systems. Their experimental implementations proved to be key to unveiling novel phenomena in Floquet topological insulators. Here, we realize a photonic quantum walk in the presence of a synthetic gauge field, which mimics the action of an electric field on a charged particle. By tuning the energy gaps between the two quasi-energy bands, we investigate intriguing system dynamics characterized by the interplay between Bloch oscillations and Landau-Zener transitions. When both gaps at quasi-energy values of 0 and π are vanishingly small, the Floquet dynamics follows a ballistic spreading.
Bloch-Landau-Zener dynamics induced by a synthetic field in a photonic quantum walk / D'Errico, A.; Barboza, R.; Tudor, R.; Dauphin, A.; Massignan, P.; Marrucci, L.; Cardano, F.. - In: APL PHOTONICS. - ISSN 2378-0967. - ELETTRONICO. - 6:2(2021), p. 020802. [10.1063/5.0037327]