Topological swing in Bloch oscillations
Mesoscale and Nanoscale Physics
2020-11-06 v2 Quantum Physics
Abstract
We report new oscillations of wavepackets in quantum walks subjected to electric fields, that decorate the usual Bloch-Zener oscillations of insulators. The number of turning points (or sub-oscillations) within one Bloch period of these oscillations is found to be governed by the winding of the quasienergy spectrum. Thus, this provides a new physical manifestation of a topological property of periodically driven systems that can be probed experimentally. Our model, based on an oriented scattering network, is readily implementable in photonic and cold atomic setups.
Cite
@article{arxiv.2004.14261,
title = {Topological swing in Bloch oscillations},
author = {L. K. Upreti and C. Evain and S. Randoux and P. Suret and A. Amo and P. Delplace},
journal= {arXiv preprint arXiv:2004.14261},
year = {2020}
}