Evolution of nonspherical bubbles.
Evolution of nonspherical bubbles.
复制标题
非球形气泡的演变。
DOI：
--
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
L. Widrow
中科院分区：
文献类型：
--
作者：
F. Adams;K. Freese;L. Widrow
本文研究了非简并基态真实的标量场理论中产生的非球形气泡的演化。提出了一个研究径向扰动对畴壁球壳演化影响的计算框架。我们专注于真真空气泡的（经典）演化，这些气泡在一级相变中在假真空的海洋中成核，例如，就像旧的或扩展的膨胀（我们在零温度、零重力的极限下工作）。随着气泡的演化，具有非零初速度和低角波数的扰动最初增长，然后冻结;具有高波数的扰动在未扰动状态附近振荡，并最终衰减。对于所有波数，具有有限初始振幅和零初始速度的扰动很快衰减。我们的工作，以封闭的表面畴壁（最近被调用来解释宇宙学中的大尺度结构）的应用进行了讨论。
We study the evolution of nonspherical bubbles which arise in the theory of a real scalar field that has nondegenerate ground states. A calculational framework to study radial perturbations to the evolution of spherical shells of domain wall is presented. We focus on the (classical) evolution of true-vacuum bubbles which nucleate in a sea of false vacuum in a first-order phase transition, e.g., as in old or extended inflation (we work in the zero-temperature, zero-gravity limit). As the bubbles evolve, perturbations with nonzero initial velocity and low angular wave numbers grow initially and then freeze out; perturbations with high wave number oscillate about the unperturbed state and eventually decay. Perturbations with finite initial amplitude and zero initial velocity quickly decay for all wave numbers. Applications of our work to closed-surface domain walls (which have recently been invoked to explain large-scale structures in cosmology) are also discussed.