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

Details Controlled generation of coherent matter-currents using a periodic driving field Controlled generation of coherent matter-currents using a periodic driving field

2008-05-04

arxiv.org/abs/0805.0404v1

Phys. Rev. Lett. 100, 250402 (2008).

Physics

Condensed Matter

Other Condensed Matter

4.1 pages, 4 eps figures

Scientific paper

10.1103/PhysRevLett.100.250402

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.

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