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arXiv 0708.4374hep-th
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宇宙学常数问题的重整化群方法

A Renormalization Group Approach to the Cosmological Constant Problem

S. -H. Henry Tye

摘要:

在早期的论文中,有人提出,由于共振隧穿效应,隧道从一个大的宇宙学常数$Λ$网站在stringy漫画景观可以快速,而隧道从一个小的$Λ$网站可能需要指数长的时间。借用安德森局域化跃迁电导的重整化群分析,我们将景观视为一个多维随机势,发现景观的广阔性导致在一个小的临界值$Λ_{c}$处从$Λ> Λ_{c} $的快速隧穿到$Λ_{c} > Λ>0$的抑制隧穿的急剧转变.景观中的流动性使得永恒的通货膨胀非常不可能。作为一个例子,我们发现,$Λ_{c}$可以很容易地指数小相比,弦/普朗克尺度。这些性质可能有助于我们找到一个定性的理解,为什么今天的暗能量是如此之小。

英文摘要:

In an earlier paper, it is proposed that, due to resonance tunneling effect, tunneling from a large cosmological constant $Λ$ site in the stringy comic landscape can be fast, while tunneling from a small $Λ$ site may take exponentially long time. Borrowing the renormalization group analysis of the conductance in the Anderson localization transition, we treat the landscape as a multi-dimensional random potential and find that the vastness of the landscape leads to a sharp transition at a small critical value $Λ_{c}$ from fast tunneling for $Λ> Λ_{c} $ to suppressed tunneling for $Λ_{c} > Λ>0$. Mobility in the landscape makes eternal inflation highly unlikely. As an illustration, we find that $Λ_{c}$ can easily be exponentially small compared to the string/Planck scale. These properties may help us in finding a qualitative understanding why today's dark energy is so small.

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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