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arXiv 2403.20164gr-qcastro-ph.COhep-ph
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宇宙学相变中引力波的单气泡源

A single-bubble source for gravitational waves in a cosmological phase transition

Kfir Blum, Mehrdad Mirbabayi

AI总结:

本文提出单个膨胀相变气泡的量子涨落即可产生引力波,推导了反作用时间尺度,并指出该信号即使对未来实验也难以探测。

摘要:

我们证明,膨胀相变气泡的量子涨落会产生引力波(GW)辐射,即使只考虑单个气泡,无需气泡碰撞或等离子体效应。GW能量与气泡总能量库的比值随时间按 $\propto t$ 增长。如果气泡在渗流摧毁它之前膨胀足够长的时间,由GW辐射引起的反作用将在 $t_{\rm br}\sim (16π^5) m_{\rm pl}^2R_0^3$ 之后变得重要,其中 $R_0$ 是气泡成核半径,$m_{\rm pl}$ 是约化普朗克质量。从当今实验的角度看,GW能谱将呈现蓝色。然而,简单估算表明,即使是未来雄心勃勃的实验,该信号也远不足以被探测到。

英文摘要:

We show that quantum fluctuations of an expanding phase transition bubble give rise to gravitational wave (GW) emission, even when considering a single bubble, without bubble collisions or plasma effects. The ratio of GW energy to the total bubble energy reservoir increases with time as $\propto t$. If the bubble expands for long enough before percolation destroys it, back-reaction due to the GW emission becomes important after $t_{\rm br}\sim (16π^5) m_{\rm pl}^2R_0^3$, where $R_0$ is the bubble nucleation radius and $m_{\rm pl}$ is the reduced Planck mass. As seen by experiments today, the GW energy spectrum would appear blue. However, simple estimates suggest that the signal falls short of detection by even ambitious future experiments.

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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