Phys. Rev. Lett. 102, 230601 (2009) [4 pages]ac-Driven Atomic Quantum MotorReceived 3 February 2009; revised 10 April 2009; published 8 June 2009 We propose 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 nonzero value. We also demonstrate that this quantum motor performs work against a constant load. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.102.230601
DOI:
10.1103/PhysRevLett.102.230601
PACS:
05.60.−k, 37.10.Jk, 84.50.+d
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