Generation of atypical hopping and interactions by kinetic driving
Abstract
We study the effect of time-periodically varying the hopping amplitude in a one-dimensional Bose-Hubbard model, such that its time-averaged value is zero. Employing Floquet theory, we derive a static effective Hamiltonian in which nearest-neighbor single-particle hopping processes are suppressed, but all even higher-order processes are allowed. Unusual many-body features arise from the combined effect of nonlocal interactions and correlated tunneling. At a critical value of the driving, the system passes from a Mott insulator to a superfluid formed by two quasi-condensates with opposite nonzero momenta. This work shows how driving of the hopping energy provides a novel form of Floquet engineering, which enables atypical Hamiltonians and exotic states of matter to be produced and controlled.
Keywords
Cite
@article{arxiv.1706.04864,
title = {Generation of atypical hopping and interactions by kinetic driving},
author = {Gregor Pieplow and Fernando Sols and Charles E. Creffield},
journal= {arXiv preprint arXiv:1706.04864},
year = {2018}
}
Comments
Minor changes and references added, this version as published