当过冷因有效势的曲率翻转而终止时会发生什么?

IF 5.4 1区 物理与天体物理 Q1 Physics and Astronomy
Tomasz P. Dutka, Tae Hyun Jung, Chang Sub Shin
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引用次数: 0

摘要

我们探讨了一类过冷相变的性质,其中过冷是由于有限温度有效势在原点的曲率在某一温度下经历符号翻转而保证结束的。在这种模型中,捕获在亚稳定原点的标量场的势垒在相变的温度尺度上迅速消失。因此,目前还不清楚是否能够形成临界气泡,或者磁场是否会简单地越过屏障并平稳地滚动到真正的最小值。为了解决这个问题,我们对一个表现出过冷的标量势进行了晶格模拟,在原点周围有一个小的势垒,并定性地确定了相变的命运。我们的模拟表明,由于所要求的势的平整度,标量场仍然被困在原点周围,使得相变一般通过真真空气泡的成核和膨胀进行。我们评论了在一个具体的玩具模型中可能出现的引力波信号,并讨论了气泡渗透可能发生和不可能发生的参数空间。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
What happens when supercooling is terminated by curvature flipping of the effective potential?

We explore the nature of a certain type of supercooled phase transition, where the supercooling is guaranteed to end due to the curvature of the finite-temperature effective potential at the origin experiencing a sign flip at some temperature. In such models the potential barrier trapping the scalar field at the meta-stable origin is quickly vanishing at the temperature scale of the phase transition. It is therefore not immediately clear if critical bubbles are able to form, or whether the field will simply transition over the barrier and smoothly roll down to the true minimum. To address this question, we perform lattice simulations of a scalar potential exhibiting supercooling, with a small barrier around the origin, and qualitatively determine the fate of the phase transition. Our simulations indicate that, owing to the required flatness of the potential, the scalar field remains trapped around the origin such that the phase transition generically proceeds via the nucleation and expansion of true-vacuum bubbles. We comment on the possible gravitational wave signals one might expect in a concrete toy model and discuss the parameter space in which bubble percolation is and isn’t expected.

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来源期刊
Journal of High Energy Physics
Journal of High Energy Physics 物理-物理:粒子与场物理
CiteScore
10.30
自引率
46.30%
发文量
2107
审稿时长
1.5 months
期刊介绍: The aim of the Journal of High Energy Physics (JHEP) is to ensure fast and efficient online publication tools to the scientific community, while keeping that community in charge of every aspect of the peer-review and publication process in order to ensure the highest quality standards in the journal. Consequently, the Advisory and Editorial Boards, composed of distinguished, active scientists in the field, jointly establish with the Scientific Director the journal''s scientific policy and ensure the scientific quality of accepted articles. JHEP presently encompasses the following areas of theoretical and experimental physics: Collider Physics Underground and Large Array Physics Quantum Field Theory Gauge Field Theories Symmetries String and Brane Theory General Relativity and Gravitation Supersymmetry Mathematical Methods of Physics Mostly Solvable Models Astroparticles Statistical Field Theories Mostly Weak Interactions Mostly Strong Interactions Quantum Field Theory (phenomenology) Strings and Branes Phenomenological Aspects of Supersymmetry Mostly Strong Interactions (phenomenology).
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