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arXiv 0912.2271gr-qc
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超越标准暴胀的宇宙学一级相变

Cosmological first-order phase transitions beyond the standard inflationary scenario

Aleksandar Rakic, Dennis Simon, Julian Adamek, Jens C. Niemeyer

摘要:

受宇宙学一级相变的启发,我们研究了非真空环境中真空泡的成核和演化。非标准背景可以在景观上的快速隧道过程的背景下相关。利用复杂的时间方法,我们表明,隧道速率可以显着修改的情况下,动态FRW背景。我们给出了一个分类的重要性的影响,在相关的动力学时间尺度。对于气泡的成核和演化分析,我们利用薄壁近似。从经典的气泡演化均匀物质的背景下,通过结的方法,我们发现,真空气泡的膨胀是非常敏感的环境物质的存在,并量化这一说法。我们还采用非均匀物质模型(LTB)和模型,经历了一个快速的相变(FRW)作为背景,并讨论在这种情况下,潜在的可观察到的痕迹上的气泡轨迹可以保留。

英文摘要:

Motivated by cosmological first-order phase transitions we examine the nucleation and evolution of vacuum bubbles in non-vacuum environments. Non-standard backgrounds can be relevant in the context of rapid tunneling processes on the landscape. Utilising complex time methods, we show that tunneling rates can be notably modified in the case of dynamical FRW backgrounds. We give a classification of the importance of the effect in terms of the relevant dynamical time scales. For both the bubble nucleation and evolution analysis we make use of the thin-wall approximation. From the classical bubble evolution on homogeneous matter backgrounds via the junction method, we find that the inflation of vacuum bubbles is very sensitive to the presence of ambient matter and quantify this statement. We also employ inhomogeneous matter models (LTB) and models that undergo a rapid phase transition (FRW) as a background and discuss in which cases potentially observable imprints on the bubble trajectory can remain.

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