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arXiv 1306.1178hep-thnlin.PS
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双sine-Gordon孤子与外势相互作用的解析模型

Interaction of double sine-Gordon solitons with external potentials: an analytical model

Samira Nazifkar, Kurosh Javidan, Mohsen Sarbishaei

摘要:

采用基于集体坐标的解析模型研究了双sine-Gordon孤子与空间势壁和势阱的相互作用。通过对背景时空的适当的非平凡度量,将势加入到模型中。该模型能够预测孤子-势相互作用的大部分特征。结果表明,当孤子的速度大于临界速度时,孤子可以通过势垒,临界速度是孤子初始条件和势的函数。有趣的是,双sine-Gordon模型的孤子可以被势垒捕获并在那里振荡。这种情况在应用物理中非常重要。利用该模型对孤子阱系统进行了研究。分析结果也已与直接数值解的结果进行了比较。

英文摘要:

Interaction of Double sine-Gordon solitons with a space dependent potential wall and also a potential well has been investigated by employing an analytical model based on the collective coordinate approach. The potential has been added to the model through a suitable nontrivial metric for the background space-time. The model is able to predict most of the features of the soliton-potential interaction. It is shown that a soliton can pass through a potential barrier if its velocity is greater than a critical velocity which is a function of soliton initial conditions and also characters of the potential. It is interesting that the solitons of the double sine-Gordon model can be trapped by a potential barrier and oscillate there. This situation is very important in applied physics. Soliton-well system has been investigated using the presented model too. Analytical results also have been compared with the results of the direct numerical solutions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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