2010/09/29 by Gabriel G. Carlo, Leonardo Ermann, F. Borondo +1
Computer Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Nonlinear Dynamics and Pattern Formation #cond-mat.soft #quant-ph #stochastic dynamics and bifurcation
paper · pdf · doi:10.1103/physreve.83.011103
published as Phys. Rev. E 83, 011103 (2011) · 6 pages, 5 figures
arxiv created 2010/09/29 · openalex publication_date 2011/01/05 · arxiv updated 2013/01/31 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The transitory and stationary behavior of a quantum chaotic ratchet consisting of a biharmonic potential under the effect of different drivings in contact with a thermal environment is studied. For weak forcing and finite ℏ, we identify a strong dependence of the current on the structure of the chaotic region. Moreover, we have determined the robustness of the current against thermal fluctuations in the very weak coupling regime. In the case of strong forcing, the current is determined by the shape of a chaotic attractor. In both cases the temperature quickly stabilizes the ratchet, but in the latter it also destroys the asymmetry responsible for the current generation. Finally, applications to isomerization reactions are discussed.