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Quantum ratchets at high temperatures

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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]
Copyright of Physica E is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 18728686
AccessLevel: 6
PubType: Academic Journal
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  Data: 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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  Data: <i>Copyright of Physica E is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.physe.2005.05.043
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              Text: Oct2005
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