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arXiv · 2011.05893

Bloch-Landau-Zener dynamics induced by a synthetic field in a photonic quantum walk

Alessio D'Errico·Raouf Barboza·Rebeca Tudor·Alexandre Dauphin·Pietro Massignan·Lorenzo Marrucci·Filippo Cardano
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Abstract

Quantum walks are processes that model dynamics in coherent systems. Their experimental implementations proved key to unveil 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 0 and $\pi$ are vanishingly small, the Floquet dynamics follows a ballistic spreading.

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cond-mat.mes-hallcond-mat.quant-gasphysics.opticsquant-ph

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Alessio D'Errico, Raouf Barboza, Rebeca Tudor, Alexandre Dauphin, Pietro Massignan, Lorenzo Marrucci, Filippo Cardano. 2020-11-11. Bloch-Landau-Zener dynamics induced by a synthetic field in a photonic quantum walk. https://doi.org/10.1063/5.0037327

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