Electric Quantum Walks (Journal club)

In discrete time quantum walks the effect of the electronic field can be described by multiplication with a position dependent phase factor. The recorded dynamics of such a quantum particle exhibits features closely related to Bloch oscillations and interband tunneling. In particular, we explore the regime of strong fields, demonstrating contrasting quantum behaviors: quantum resonances vs dynamical localization depending on whether the accumulated Bloch phase is a rational or irrational fraction of 2π.