Dynamics of elliptic breathers in saturable nonlinear media with linear anisotropy

Dynamics of elliptic breathers in saturable nonlinear media with linear anisotropy
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具有线性各向异性的可饱和非线性介质中椭圆呼吸器的动力学

DOI:
10.1088/2040-8978/16/8/085205
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发表时间:
2014-02
期刊:
影响因子:
2.1
通讯作者:
Zhanmei Ren
Zhanmei Ren
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Guo Liang;Qi Guo;Qian Shou;Zhanmei Ren

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在线性各向异性饱和非线性介质中引入了一类动态椭圆呼吸子。用变分法预测了动态呼吸子的两种演化行为:转动和类分子振动,并在数值模拟中得到了证实。动力学椭圆呼吸子即使没有初始轨道角动量也可以旋转。由于介质是线性各向异性的,OAM不再守恒,因此角速度不是常数,而是传播距离的周期函数。当线性各向异性足够大时,动力学椭圆呼吸子像分子一样振动。动态椭圆呼吸子不仅存在于饱和非线性介质中,而且存在于非局部非线性介质中,在线性各向异性非线性介质中也普遍存在。
We have introduced a class of dynamic elliptic breathers in saturable nonlinear media with linear anisotropy. Two kinds of evolution behavior for the dynamic breathers, rotations and molecule-like librations, are both predicted by the variational approach, and confirmed in numerical simulations. The dynamic elliptic breathers can rotate even though they have no initial orbital angular momentum (OAM). As the media are linear anisotropic, OAM is no longer conserved, and hence the angular velocity is not constant but a periodic function of the propagation distance. When the linear anisotropy is large enough, the dynamic elliptic breathers librate like molecules. The dynamic elliptic breathers are present in media with not only saturable nonlinearity but also nonlocal nonlinearity; indeed, they are universal in nonlinear media with linear anisotropy.
DOI: --
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期刊: --
影响因子: --
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