Publication: External fluctuations in front dynamics with inertia: the overdamped limit
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ISSN: 1434-6028 (print version)
ISSN: 1434-6036 (online version)
Publication date
2000-11-01
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Springer
Abstract
We study the dynamics of fronts when both inertial e ects and external fluctuations are taken
into account. Stochastic fluctuations are introduced as multiplicative white noise arising from a control
parameter of the system. Contrary to the non-inertial (overdamped) case, we nd that important features
of the system, such as the velocity selection picture, are not modi ed by the noise. We then compute the
overdamped limit of the underdamped dynamics in a more careful way, nding that it does not exhibit
any e ect of noise either. Our result poses the question as to whether or not external noise sources can be
measured in physical systems of this kind.
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Bibliographic citation
The European Physical Journal B, vol. 16, n. 1, nov. 2000. Pp. 127-131