https://doi.org/10.1140/epjp/s13360-020-00660-w
Regular Article
The routes to stability of spatially periodic solutions of the linearly damped NLS equation
Department of Mathematics, University of Central Florida, 32816, Orlando, FL, USA
Received:
4
June
2020
Accepted:
30
July
2020
Published online:
10
August
2020
Spatially periodic breather solutions (SPBs) of the nonlinear Schrödinger (NLS) equation, i.e., the heteroclinic orbits of unstable Stokes waves, are typically unstable. In this paper, we study the effects of dissipation on single-mode and multi-mode SPBs using a linearly damped NLS equation. The number of instabilities the background Stokes wave possesses and the damping strength are varied. Viewing the damped dynamics as near integrable, the perturbed flow is analyzed by appealing to the spectral theory of the NLS equation. A broad categorization of the routes to stability of the SPBs and how the route depends on the mode structure of the SPBs and the instabilities of the Stokes wave is obtained as well as the distinguishing features of the damped flow.
© Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2020
