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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >The general Klein-Gordon-Schrodinger system: modulational instability and exact solutions
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The general Klein-Gordon-Schrodinger system: modulational instability and exact solutions

机译:通用Klein-Gordon-Schrodinger系统:调制不稳定性和精确解

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摘要

The general Klein-Gordon-Schrodinger (gKGS) system is studied where the cubic auto-interactions are introduced in both the nonlinear Schrodinger and the nonlinear Klein-Gordon fields. We first investigate the modulational instability (MI) of the system, and thus derive the general dispersion relation between the frequency and wavenumber of the modulating perturbations, which demonstrates many possibilities for the MI regions. Using the travelling wave reduction, the gKGS system is greatly simplified. Via a simple function expansion method, we obtain some exact travelling wave solutions. Under some special parameter values, some representative wave structures are graphically displayed including the kink, anti-kink, bright, dark, grey and periodic solitons.
机译:研究了通用Klein-Gordon-Schrodinger(gKGS)系统,其中在非线性Schrodinger场域和非线性Klein-Gordon场域中都引入了三次自相互作用。我们首先研究系统的调制不稳定性(MI),从而得出调制扰动的频率和波数之间的一般色散关系,这证明了MI区域的许多可能性。通过减少行波,可以大大简化gKGS系统。通过简单的函数扩展方法,我们可以获得一些精确的行波解。在某些特殊参数值下,将以图形方式显示一些代表性的波结构,包括扭结,反扭结,亮,暗,灰色和周期性孤子。

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