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Transactions of the American Mathematical Society

Published by the American Mathematical Society since 1900, Transactions of the American Mathematical Society is devoted to longer research articles in all areas of pure and applied mathematics.

ISSN 1088-6850 (online) ISSN 0002-9947 (print)

The 2024 MCQ for Transactions of the American Mathematical Society is 1.48 .

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Exponential averaging for Hamiltonian evolution equations
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by Karsten Matthies and Arnd Scheel
Trans. Amer. Math. Soc. 355 (2003), 747-773
DOI: https://doi.org/10.1090/S0002-9947-02-03143-4
Published electronically: October 2, 2002

Abstract:

We derive estimates on the magnitude of non-adiabatic interaction between a Hamiltonian partial differential equation and a high-frequency nonlinear oscillator. Assuming spatial analyticity of the initial conditions, we show that the dynamics can be transformed to the uncoupled dynamics of an infinite-dimensional Hamiltonian system and an anharmonic oscillator, up to coupling terms which are exponentially small in a certain power of the frequency of the oscillator. The result is derived from an abstract averaging theorem for infinite-dimensional analytic evolution equations in Gevrey spaces. Refining upon a similar result by Neishtadt for analytic ordinary differential equations, the temporal estimate crucially depends on the spatial regularity of the initial condition. The result shows to what extent the strong resonances between rapid forcing and highly oscillatory spatial modes can be suppressed by the choice of sufficiently smooth initial data. An application is provided by a system of nonlinear Schrödinger equations, coupled to a rapidly forcing single mode, representing small-scale oscillations. We provide an example showing that the estimates for partial differential equations we derive here are necessarily different from those in the context of ordinary differential equations.
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Bibliographic Information
  • Karsten Matthies
  • Affiliation: Mathematical Institute, University of Warwick, Coventry CV4 7AL, United Kingdom
  • Address at time of publication: FU Berlin, Institut für Mathematik I, Arnimallee 2-6, 14195 Berlin, Germany
  • MR Author ID: 653313
  • Email: matthies@maths.warwick.ac.uk, matthies@math.fu-berlin.de
  • Arnd Scheel
  • Affiliation: School of Mathematics, University of Minnesota, 206 Church St. S.E., Minneapolis, Minnesota 55455
  • MR Author ID: 319772
  • ORCID: 0000-0001-6667-3003
  • Email: scheel@math.umn.edu
  • Received by editor(s): October 8, 2001
  • Received by editor(s) in revised form: May 15, 2002
  • Published electronically: October 2, 2002
  • Additional Notes: The first author was supported by the Deutsche Forschungsgemeinschaft (DFG) under grant Ma 2351/1
    The second author gratefully acknowledges support from DAAD/Procope, Nr. D/0031082
  • © Copyright 2002 American Mathematical Society
  • Journal: Trans. Amer. Math. Soc. 355 (2003), 747-773
  • MSC (2000): Primary 37K55, 37L10, 70K65; Secondary 35Q55, 70K70
  • DOI: https://doi.org/10.1090/S0002-9947-02-03143-4
  • MathSciNet review: 1932724