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arXiv · 1706.04864

Generation of atypical hopping and interactions by kinetic driving

Gregor Pieplow·Fernando Sols·Charles E. Creffield
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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.

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Gregor Pieplow, Fernando Sols, Charles E. Creffield. 2017-06-15. Generation of atypical hopping and interactions by kinetic driving. https://doi.org/10.1088/1367-2630/aad376

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