ac-driven atomic quantum motor
arXiv:0902.0489 · doi:10.1103/PhysRevLett.102.230601
Abstract
We invent an ac-driven quantum motor consisting of two different, interacting ultracold atoms placed into a ring-shaped optical lattice and submerged in a pulsating magnetic field. While the first atom carries a current, the second one serves as a quantum starter. For fixed zero-momentum initial conditions the asymptotic carrier velocity converges to a unique non-zero value. We also demonstrate that this quantum motor performs work against a constant load.
4 pages, 4 figures
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