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arXiv 0704.0144hep-thastro-phgr-qc
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景观的永恒膨胀和局部化

Eternal inflation and localization on the landscape

D. Podolsky, K. Enqvist

摘要:

我们用势$V(ϕ)=V_{0}+δV(ϕ)$模拟了真空稠密离散空间上的永恒暴胀的基本特征,其中$|δV(ϕ)|\ll V_{0}$是随机的。我们发现暴胀子期望值的分布函数$ρ(ϕ,t)$在不同的Hubble片中的扩散可能由于类似于无序量子系统中的安德森局域化的效应而受到抑制。在$t \to \infty$只有局部的分布函数$ρ(ϕ, t)$的生存,导致动态选择原则的景观。在给定的哈勃斑块上测量宇宙学常数的任何值(除了一个小值)的概率在$t\to \infty$处被指数抑制。

英文摘要:

We model the essential features of eternal inflation on the landscape of a dense discretuum of vacua by the potential $V(ϕ)=V_{0}+δV(ϕ)$, where $|δV(ϕ)|\ll V_{0}$ is random. We find that the diffusion of the distribution function $ρ(ϕ,t)$ of the inflaton expectation value in different Hubble patches may be suppressed due to the effect analogous to the Anderson localization in disordered quantum systems. At $t \to \infty$ only the localized part of the distribution function $ρ(ϕ, t)$ survives which leads to dynamical selection principle on the landscape. The probability to measure any but a small value of the cosmological constant in a given Hubble patch on the landscape is exponentially suppressed at $t\to \infty$.

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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