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Existence and stability of 3-site breathers in a triangular lattice
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UNSPECIFIED (2005) Existence and stability of 3-site breathers in a triangular lattice. JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 38 (5). pp. 1021-1030. doi:10.1088/0305-4470/38/5/004 ISSN 0305-4470.
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Official URL: http://dx.doi.org/10.1088/0305-4470/38/5/004
Abstract
We find conditions for existence and stability of various types of discrete breather concentrated around three central sites in a triangular lattice of one-dimensional Hamiltonian oscillators with on-site potential and nearest-neighbour coupling. In particular, we confirm that it can support non-reversible breather solutions, despite the time-reversible character of the system. They carry a net energy flux and can be called 'vortex breathers'. We prove that there are parameter regions for which they are linearly stable, for example in a lattice consisting of coupled Morse oscillators, whereas the related reversible breathers are unstable. Thus non-reversible breathers can be physically relevant.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QC Physics | ||||
Journal or Publication Title: | JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL | ||||
Publisher: | IOP PUBLISHING LTD | ||||
ISSN: | 0305-4470 | ||||
Official Date: | 4 February 2005 | ||||
Dates: |
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Volume: | 38 | ||||
Number: | 5 | ||||
Number of Pages: | 10 | ||||
Page Range: | pp. 1021-1030 | ||||
DOI: | 10.1088/0305-4470/38/5/004 | ||||
Publication Status: | Published |
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