Breathers on lattices with long range interaction

Details Breathers on lattices with long range interaction Breathers on lattices with long range interaction

1998-09-29

arxiv.org/abs/cond-mat/9809387v1

Physics

Condensed Matter

4 pages, 2 figures, PRB Rapid Comm. October 1998

Scientific paper

10.1103/PhysRevE.58.R4116

We analyze the properties of breathers (time periodic spatially localized solutions) on chains in the presence of algebraically decaying interactions $1/r^s$. We find that the spatial decay of a breather shows a crossover from exponential (short distances) to algebraic (large distances) decay. We calculate the crossover distance as a function of $s$ and the energy of the breather. Next we show that the results on energy thresholds obtained for short range interactions remain valid for $s>3$ and that for $s < 3$ (anomalous dispersion at the band edge) nonzero thresholds occur for cases where the short range interaction system would yield zero threshold values.

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