Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices
We start by considering the sine-Gordon partial differential equation (PDE with an arbitrary perturbation. Using the method of Kuzmak-Luke, we investigate those conditions the perturbation must satisfy in order for a breather solution to be a valid leading-order asymptotic approximation to the p...
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| Format: | Article |
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Cambridge University Press
2015
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| Online Access: | https://eprints.nottingham.ac.uk/43989/ |
| _version_ | 1848796811634933760 |
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| author | Smith, Warren Wattis, Jonathan |
| author_facet | Smith, Warren Wattis, Jonathan |
| author_sort | Smith, Warren |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | We start by considering the sine-Gordon partial differential equation (PDE with an arbitrary perturbation. Using the method of Kuzmak-Luke, we investigate those conditions the perturbation must satisfy in order for a breather solution to be a valid leading-order asymptotic approximation to the perturbed problem. We analyse the cases of both stationary and moving breathers. As examples, we consider perturbing terms which include typical linear damping, periodic sinusoidal driving, and dispersion caused by higher order spatial derivatives. The motivation for this study is that the mathematical modelling of physical systems, often leads to the discrete sine-Gordon system of ODEs which are then approximated in the long wavelength limit by the continuous sine-Gordon PDE. Such limits typically produce fourth-order spatial derivatives as higher order correction terms. The new results show that the stationary breather solution is a consistent solution of both the quasi-continuum SG equation and the forced/damped SG system. However, the moving breather is only a consistent solution of the quasi- continuum SG equation and not the damped SG system. |
| first_indexed | 2025-11-14T19:53:55Z |
| format | Article |
| id | nottingham-43989 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| last_indexed | 2025-11-14T19:53:55Z |
| publishDate | 2015 |
| publisher | Cambridge University Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-439892020-05-04T17:10:12Z https://eprints.nottingham.ac.uk/43989/ Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices Smith, Warren Wattis, Jonathan We start by considering the sine-Gordon partial differential equation (PDE with an arbitrary perturbation. Using the method of Kuzmak-Luke, we investigate those conditions the perturbation must satisfy in order for a breather solution to be a valid leading-order asymptotic approximation to the perturbed problem. We analyse the cases of both stationary and moving breathers. As examples, we consider perturbing terms which include typical linear damping, periodic sinusoidal driving, and dispersion caused by higher order spatial derivatives. The motivation for this study is that the mathematical modelling of physical systems, often leads to the discrete sine-Gordon system of ODEs which are then approximated in the long wavelength limit by the continuous sine-Gordon PDE. Such limits typically produce fourth-order spatial derivatives as higher order correction terms. The new results show that the stationary breather solution is a consistent solution of both the quasi-continuum SG equation and the forced/damped SG system. However, the moving breather is only a consistent solution of the quasi- continuum SG equation and not the damped SG system. Cambridge University Press 2015-06-23 Article PeerReviewed Smith, Warren and Wattis, Jonathan (2015) Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices. European Journal of Applied Mathematics, 27 (1). pp. 23-41. ISSN 1469-4425 singular perturbations breathers sine-Gordon equation https://www.cambridge.org/core/journals/european-journal-of-applied-mathematics/article/necessary-conditions-for-breathers-on-continuous-media-to-approximate-breathers-on-discrete-lattices/7F081C2CA5B5527DC222D7BC065EECB2 doi:10.1017/S0956792515000273 doi:10.1017/S0956792515000273 |
| spellingShingle | singular perturbations breathers sine-Gordon equation Smith, Warren Wattis, Jonathan Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices |
| title | Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices |
| title_full | Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices |
| title_fullStr | Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices |
| title_full_unstemmed | Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices |
| title_short | Necessary conditions for breathers on continuous media to approximate breathers on discrete lattices |
| title_sort | necessary conditions for breathers on continuous media to approximate breathers on discrete lattices |
| topic | singular perturbations breathers sine-Gordon equation |
| url | https://eprints.nottingham.ac.uk/43989/ https://eprints.nottingham.ac.uk/43989/ https://eprints.nottingham.ac.uk/43989/ |