Driven and damped double sine-Gordon equation: The influence of internal modes on the soliton ratchet mobility

被引：5
|
作者：
Quintero, Niurka R. [1 ]
Alvarez-Nodarse, R. [2 ,3 ]
Mertens, Franz G. [4 ]
机构：
[1] Univ Seville, EUP, Dept Fis Aplicada 1, Seville 41011, Spain
[2] Univ Seville, Dept Anal Matemat, E-41080 Seville, Spain
[3] Univ Seville, IMUS, E-41080 Seville, Spain
[4] Univ Bayreuth, Inst Phys, D-95440 Bayreuth, Germany
来源：
PHYSICAL REVIEW E | 2009年 / 80卷 / 01期
关键词：
KINK-ANTIKINK INTERACTIONS; DYNAMICS;
D O I：
10.1103/PhysRevE.80.016605
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
This work studies the damped double sine-Gordon equation driven by a biharmonic force, where a parameter lambda controls the existence and the frequency of an internal mode. The role of internal oscillations of the kink width in ratchet dynamics of kink is investigated within the framework of collective coordinate theories. It is found that the ratchet velocity of the kink, when an internal mode appears in this system, decreases contrary to what was expected. It is also shown that the kink exhibits a higher mobility in the double sine-Gordon without internal mode, but with a quasilocalized first phonon mode.
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页数：8
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