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періодичних видань НАН України
Interaction of discrete breathers with thermal fluctuations
Репозиторій DSpace/Manakin
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Interaction of discrete breathers with thermal fluctuations
Тема:
Низкоразмерные и неупорядоченные системы
Інший ID:
PACS: 05.10.–a;05.45.Yv;63.20.Ry
Посилання:
Interaction of discrete breathers with thermal fluctuations
/ M. Eleftheriou, S. Flach // Физика низких температур. — 2008. — Т. 34, № 7. — С. 701–706. — Бібліогр.: 25 назв. — англ.
Підтримка:
This work is dedicated to the memory of Arnold
Markovich Kosevich. His early contributions in the field
of discrete breathers have been of great importance for
further progress in the subject. Arnold Markovich's continued
interest in that field, over decades, was very important,
and stimulated and motivated the interest of especially
young researchers in this rapidly evolving area of
nonlinear dynamics and physics of complex systems.
Дата:
2008
Переглядів:
680
Завантажень:
435
Анотація:
Discrete breathers (DB) are time-periodic and spatially localized lattice excitations, which can be linearly
stable or unstable with respect to either localized or extended perturbations. We analyze the interaction
of DBs with a thermalized background of small amplitude lattice excitations in a one-dimensional lattice of
Morse oscillators with nearest neighbour interaction. We find that stable DBs are barely influenced by the
thermal noise. Unstable DBs are starting to propagate through the lattice, without loosing their localization
character. The instability can be both due to localized perturbations, as well as due to extended perturbations.
We discuss these observations in terms of resonances of DBs with localized and delocalized perturbations,
and relate them to the issue of DB impact on statistical properties of nonlinear lattices.
