Tuning the mobility of a driven Bose-Einstein condensate via diabatic Floquet bands
Quantum Gases
2015-06-26 v2 Quantum Physics
Abstract
We study the response of ultracold atoms to a weak force in the presence of a temporally strongly modulated optical lattice potential. It is experimentally demonstrated that the strong ac-driving allows for a tailoring of the mobility of a dilute atomic Bose-Einstein condensate with the atoms moving ballistically either along or against the direction of the applied force. Our results are in agreement with a theoretical analysis of the Floquet spectrum of a model system, thus revealing the existence of diabatic Floquet bands in the atom's band spectra and highlighting their role in the non-equilibrium transport of the atoms.
Keywords
Cite
@article{arxiv.1202.5174,
title = {Tuning the mobility of a driven Bose-Einstein condensate via diabatic Floquet bands},
author = {T. Salger and S. Kling and S. Denisov and A. V. Ponomarev and P. Hanggi and M. Weitz},
journal= {arXiv preprint arXiv:1202.5174},
year = {2015}
}