arXiv:0805.0404 · Physical Review Letters

Controlled Generation of Coherent Matter Currents Using a Periodic Driving Field

C. E. Creffield, Fernando Sols

Published Jun 25, 2008• 29 citations

Abstract

We study the effect of a strong, oscillating driving field on the dynamics of ultracold bosons held in an optical lattice. Modeling the system as a Bose-Hubbard model, we show how the driving field can be used to produce and maintain a coherent atomic current by controlling the phase of the intersite tunneling processes. We investigate both the stroboscopic and time-averaged behavior using Floquet theory, and demonstrate that this procedure provides a stable and precise method of controlling coherent quantum systems.

DOI: 10.1103/physrevlett.100.250402

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