Quantum Ratchets at High Temperatures
Other Condensed Matter
2009-11-10 v1
Abstract
Using the continued-fraction method we solve the Caldeira-Leggett master equation in the phase-space (Wigner) representation to study Quantum ratchets. Broken spatial symmetry, irreversibility and periodic forcing allows for a net current in these systems. We calculate this current as a function of the force under adiabatic conditions. Starting from the classical limit we make the system quantal. In the quantum regime tunnel events and over-barrier wave reflection phenomena modify the classical result. Finally, using the phase-space formalism we give some insights about the decoherence in these systems.
Cite
@article{arxiv.cond-mat/0412566,
title = {Quantum Ratchets at High Temperatures},
author = {D. Zueco and J. L. Garcia-Palacios},
journal= {arXiv preprint arXiv:cond-mat/0412566},
year = {2009}
}
Comments
submitted to Physia E (proceedings of conference "Frontiers of Quantum and Mesoscopic Thermodynamics", Prague 26-29 July 2004)