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arXiv 1607.02113nlin.PSphysics.optics
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具有相位双稳性的复Swift-Hohenberg方程的斑图形成

Pattern formation in a complex Swift-Hohenberg equation with phase bistability

Manuel Martínez-Quesada, Germán J. de Valcárcel

摘要:

研究了具有相敏(参数)增益的复Swift Hohenberg方程的斑图形成。这样一个方程作为一个通用的序参量方程描述的自发振荡的发生在扩展系统提交一种强迫称为摇摆时,不稳定性是朝着长波长。应用包括二能级激光器和光折变振荡器。在摇摆作用下,系统原有的连续相位对称性被离散相位对称性所取代,从而出现相位双稳。这导致了自发形成的相位锁定的空间结构,如相域和暗环(相)腔孤子。研究了齐次解的稳定性,并进行了数值模拟,涵盖了模型的所有动力学区域,结果非常丰富。本文利用多尺度技术,对二能级激光器和光折变振荡器的摇摆复Swift-Hohenberg方程进行了形式化推导。

英文摘要:

We study pattern formation in a complex Swift Hohenberg equation with phase-sensitive (parametric) gain. Such an equation serves as a universal order parameter equation describing the onset of spontaneous oscillations in extended systems submitted to a kind of forcing dubbed rocking when the instability is towards long wavelengths. Applications include two-level lasers and photorefractive oscillators. Under rocking, the original continuous phase symmetry of the system is replaced by a discrete one, so that phase bistability emerges. This leads to the spontaneous formation of phase-locked spatial structures like phase domains and dark-ring (phase-) cavity solitons. Stability of the homogeneous solutions is studied and numerical simulations are made covering all the dynamical regimes of the model, which turn out to be very rich. Formal derivations of the rocked complex Swift-Hohenberg equation, using multiple scale techniques, are given for the two-level laser and the photorefractive oscillator.

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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