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ЖУРНАЛЫ // Письма в Журнал экспериментальной и теоретической физики // Архив

Письма в ЖЭТФ, 2015, том 101, выпуск 7, страницы 550–555 (Mi jetpl4602)

Эта публикация цитируется в 18 статьях

НЕЛИНЕЙНАЯ ДИНАМИКА

The effect of the $\phi^4$ kink's internal mode during scattering on $\mathcal{PT}$-symmetric defect

D. Saadatmanda, S. V. Dmitrievbc, D.I. Borisovde, P. G. Kevrekidisf, M. A. Fatykhovd, K. Javidana

a ­­­­Department of Physics, Ferdowsi University of Mashhad, 91775-1436 Mashhad, Iran
b Institute for Metals Superplasticity Problems RAS, 450001 Ufa, Russia
c National Research Tomsk State University, 634036 Tomsk, Russia
d Bashkir State Pedagogical University, 450000 Ufa, Russia
e Institute of Mathematics CC USC RAS, 450008 Ufa, Russia
f Department of Mathematics and Statistics, University of Massachusetts, MA 01003 Amherst, USA

Аннотация: The effect of the $\phi^4$ kink's internal mode (IM) during the scattering from a $\mathcal{PT}$-symmetric defect is investigated. It is demonstrated that if a $\phi^4$ kink hits the defect from the gain side, a noticeable IM is excited, while for the kink coming from the opposite direction the mode excitation is much weaker. In the case when the kink initially carries IM, the IM amplitude is affected by the defect if the kink moves from the gain side and it is not affected when the kink moves in the opposite direction. A two degree of freedom collective variable model is shown to be capable of reproducing principal findings of the present work.

Поступила в редакцию: 29.12.2014

Язык публикации: английский

DOI: 10.7868/S0370274X15070140


 Англоязычная версия: Journal of Experimental and Theoretical Physics Letters, 2015, 101:7, 497–502

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