Bibliographic Details
| Title: |
Quantum ratchets at high temperatures |
| Authors: |
Zueco, D. zueco@unizar.es, García-Palacios, J.L.1 |
| Source: |
Physica E. Oct2005, Vol. 29 Issue 1/2, p435-441. 7p. |
| Subjects: |
Quantum theory, Mechanics (Physics), Thermodynamics, Physics |
| Abstract: |
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. [Copyright &y& Elsevier] |
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| Database: |
Engineering Source |
