Current reversals in a rocking ratchet: the frequency domain
  Motivated by recent work [D. Cubero et al., Phys. Rev. E 82, 041116 (2010)], we examine the mechanisms which determine current reversals in rocking ratchets as observed by varying the frequency of the drive. We found that a class of these current reversals in the frequency domain are precisely determined by dissipation-induced symmetry breaking. Our experimental and theoretical work thus extends and generalizes the previously identified relationship between dynamical and symmetry-breaking mechanisms in the generation of current reversals. 
A. Wickenbrock, D. Cubero, N. A. Abdul Wahab, P. Phoonthong, and F.   Renzoni
cond-mat.stat-mech physics.atom-ph quant-ph