对数势的I球形成
I-ball formation with logarithmic potential
摘要：
一个相干振荡的实标量场，其势比二次场浅，分裂成称为I球的球形物体。本文研究了对数势下的I球形成问题，它出现在许多宇宙学模型中。我们进行晶格模拟，发现形成的I-球时，潜在的二次项成为主导。在绝热不变量守恒的假设下，我们进一步估计了I-ball轮廓，得到了与数值模拟一致的结果。
英文摘要：
A coherently oscillating real scalar field with potential shallower than quadratic one fragments into spherical objects called I-balls. We study the I-ball formation for logarithmic potential which appears in many cosmological models. We perform lattice simulations and find that the I-balls are formed when the potential becomes dominated by the quadratic term. Furthermore, we estimate the I-ball profile assuming that the adiabatic invariant is conserved during formation and obtain the result that agrees to the numerical simulations.
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