Solitons on pseudo-Riemannian manifolds: stability and motion
Author:
David M. A. Stuart
Journal:
Electron. Res. Announc. Amer. Math. Soc. 6 (2000), 75-89
MSC (2000):
Primary 58J45, 37K45; Secondary 35Q75, 83C10, 37K40
DOI:
https://doi.org/10.1090/S1079-6762-00-00084-6
Published electronically:
October 5, 2000
MathSciNet review:
1783091
Full-text PDF Free Access
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Abstract: This is an announcement of results concerning a class of solitary wave solutions to semilinear wave equations. The solitary waves studied are solutions of the form $\phi (t,x)=e^{i\omega t}f_\omega (x)$ to semilinear wave equations such as $\Box \phi +m^2\phi =\beta (|\phi |)\phi$ on $\mathbb {R}^{1+n}$ and are called nontopological solitons. The first preprint provides a new modulational approach to proving the stability of nontopological solitons. This technique, which makes strong use of the inherent symplectic structure, provides explicit information on the time evolution of the various parameters of the soliton. In the second preprint a pseudo-Riemannian structure $\underline {g}$ is introduced onto $\mathbb {R}^{1+n}$ and the corresponding wave equation is studied. It is shown that under the rescaling $\underline {g}\to \epsilon ^{-2} \underline {g}$, with $\epsilon \to 0$, it is possible to construct solutions representing nontopological solitons concentrated along a time-like geodesic.
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wein72 S. Weinberg, Gravitation and Cosmology, Wiley, New York, 1972.
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wein85 M. Weinstein, Modulational stability of ground states of nonlinear Schrödinger equations, SIAM J. Math. Anal. 16 (1985), 472–491.
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Additional Information
David M. A. Stuart
Affiliation:
Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 OWA, UK
Email:
D.M.A.Stuart@damtp.cam.ac.uk
Keywords:
Wave equations on manifolds,
nontopological solitons,
stability,
solitary waves.
Received by editor(s):
April 30, 2000
Published electronically:
October 5, 2000
Additional Notes:
The author acknowledges support from EPSRC Grant AF/98/2492.
Communicated by:
Michael Taylor
Article copyright:
© Copyright 2000
American Mathematical Society