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Discrete breathers in thermal equilibrium: distributions and energy gaps

โœ Scribed by M. Eleftheriou; S. Flach

Publisher
Elsevier Science
Year
2005
Tongue
English
Weight
799 KB
Volume
202
Category
Article
ISSN
0167-2789

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โœฆ Synopsis

We study a discrete two-dimensional nonlinear system that allows for discrete breather solutions. We perform a spectral analysis of the lattice dynamics at thermal equilibrium and use a cooling technique to measure the amount of breathers at thermal equilibrium. Our results confirm the existence of an energy threshold for discrete breathers. The cooling method provides a novel way of measuring and analyzing discrete breather distribution properties in thermal equilibrium.

๐Ÿ“œ SIMILAR VOLUMES

Breathers in one-dimensional nonlinear t
Breathers in one-dimensional nonlinear thermalized lattice with an energy gap
โœ M. Eleftheriou; S. Flach; G.P. Tsironis ๐Ÿ“‚ Article ๐Ÿ“… 2003 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 196 KB

We study a model of a nonlinear lattice with an on-site potential that induces a breather gap, i.e. a frequency interval where breathers are unstable. The gap is determined numerically and after thermalization of the system we compute power spectra of local displacements. We find that the gap is cle