Controlled generation of coherent matter currents using a periodic driving field.

  title={Controlled generation of coherent matter currents using a periodic driving field.},
  author={C. E. Creffield and Fernando Sols},
  journal={Physical review letters},
  volume={100 25},
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… CONTINUE READING


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