title: Temperature resistant optimal ratchet transport.
abstract: Stable periodic structures containing optimal ratchet transport, recently found in the parameter space dissipation versus ratchet parameter by [A. Celestino et al. Phys. Rev. Lett. 106, 234101 (2011)], are shown to be resistant to reasonable temperatures, reinforcing the expectation that they are essential to explain the optimal ratchet transport in nature. Critical temperatures for their destruction, valid from the overdamping to close to the conservative limits, are obtained numerically and shown to be connected to the current efficiency, given here analytically. A region where thermal activation of the rachet current takes place is also found, and its underlying mechanism is unveiled. Results are demonstrated for a discrete ratchet model and generalized to the Langevin equation with an additional external oscillating force.
authors.affiliation: Departamento de Física, Universidade do Estado de Santa Catarina, 89219-710 Joinville, Brazil.
authors.forename: C
authors.initials: C
authors.lastname: Manchein
authors.affiliation: Departamento de Física, Universidade Federal do Paraná, 81531-980 Curitiba, Brazil.
authors.forename: A
authors.initials: A
authors.lastname: Celestino
authors.affiliation: Departamento de Física, Universidade Federal do Paraná, 81531-980 Curitiba, Brazil and Max-Planck-Institute for the Physics of Complex Systems, Nöthnitzer Strasse 38, 01187 Dresden, Germany.
authors.forename: M W
authors.initials: MW
authors.lastname: Beims