| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9789679 | Physica E: Low-dimensional Systems and Nanostructures | 2005 | 7 Pages |
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 forcing. 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.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
D. Zueco, J.L. GarcÃa-Palacios,