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Comment on “Soliton ratchets induced by excitation of internal modes”

 

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Opened Access Comment on “Soliton ratchets induced by excitation of internal modes”
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Author: Quintero, Niurka R.
Sánchez-Rey, Bernardo
Casado Pascual, Jesús
Department: Universidad de Sevilla. Departamento de Física Aplicada I
Universidad de Sevilla. Departamento de Física Atómica, Molecular y Nuclear
Date: 2005
Published in: Physical Review E, 2005, 71(5), 058601: 1-2
Document type: Article
Abstract: Very recently Willis et al. [Phys. Rev. E 69, 056612 (2004)] have used a collective variable theory to explain the appearance of a nonzero energy current in an ac-driven, damped sine-Gordon equation. In this Comment, we prove rigorously that the time-averaged energy current in an ac-driven nonlinear Klein-Gordon system is strictly zero.
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URI: http://hdl.handle.net/11441/23619

DOI: 10.1103/PhysRevE.71.058601

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