Yuval Baum, Evert P. L. van Nieuwenburg, Gil Refael
SciPost Phys. 5, 017 (2018) ·
published 16 August 2018
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We show that a quantum many-body system may be controlled by means of Floquet
engineering, i.e., their properties may be controlled and manipulated by
employing periodic driving. We present a concrete driving scheme that allows
control over the nature of mobile units and the amount of diffusion in generic
many-body systems. We demonstrate these ideas for the Fermi-Hubbard model,
where the drive renders doubly occupied sites (doublons) the mobile excitations
in the system. In particular, we show that the amount of diffusion in the
system and the level of fermion-pairing may be controlled and understood solely
in terms of the doublon dynamics. We find that under certain circumstances the
diffusion in the system may be eliminated completely. We conclude our work by
generalizing these ideas to generic many-body systems.
