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arXiv 2303.04750hep-thgr-qcmath-phmath.MPnlin.PS
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sine-Gordon 呼吸子向振荡子的维度形变

Dimensional deformation of sine-Gordon breathers into oscillons

José T. Gálvez Ghersi, Jonathan Braden

AI总结:

本文通过将 sine-Gordon 模型维度作为实参数形变呼吸子,生成球对称振荡子,发现小形变下振荡子可视为微扰呼吸子,并在高维中观察到核心间歇收缩膨胀及临界动力学。

摘要:

振荡子是局域化的场构型,随时间振荡,其寿命比振荡周期长多个数量级。在本文中,我们模拟了通过形变 sine-Gordon 模型的呼吸子解而产生的非行波振荡子。这种形变将模型的维度视为一个实参数,从而产生球对称的振荡子。在将瞬态后的振荡频率作为控制参数后,我们探测初始参数空间,以在不同维度下连续连接呼吸子和振荡子。对于足够小的维度形变,我们发现振荡子可以被视为呼吸子的微扰形变。在 $D\gtrsim 2$ 空间维度中,我们观察到解经历其核心的间歇性收缩和膨胀阶段。已知稳定和不稳定的构型可以映射到呼吸子参数空间的不相交区域,我们发现振幅调制解位于两个稳定性区域的中间。这些解展示了在稳定性极限附近临界行为的动力学。

英文摘要:

Oscillons are localized field configurations oscillating in time with lifetimes orders of magnitude longer than their oscillation period. In this paper, we simulate non-travelling oscillons produced by deforming the breather solutions of the sine-Gordon model. Such a deformation treats the dimensionality of the model as a real parameter to produce spherically symmetric oscillons. After considering the post-transient oscillation frequency as a control parameter, we probe the initial parameter space to continuously connect breathers and oscillons at various dimensionalities. For sufficiently small dimensional deformations, we find that oscillons can be treated as perturbatively deformed breathers. In $D\gtrsim 2$ spatial dimensions, we observe solutions undergoing intermittent phases of contraction and expansion in their cores. Knowing that stable and unstable configurations can be mapped to disjoint regions of the breather parameter space, we find that amplitude modulated solutions are located in the middle of both stability regimes. These solutions display the dynamics of critical behavior around the stability limit.

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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