论文标题

catch-me-if-you-can:过时的问题和弱/通货膨胀层次结构

Catch-Me-If-You-Can: The Overshoot Problem and the Weak/Inflation Hierarchy

论文作者

Conlon, Joseph P., Revello, Filippo

论文摘要

我们研究了通货膨胀后弦宇宙学(尤其是LVS)的过时问题。 LVS宇宙学具有长的Kination时期,因为音量模量向下向下倾斜斜率,其能量密度为$ M_S^4 $。该卷承认吸引者跟踪解决方案,如果这些解决方案是解决问题的问题。我们表明,在通货膨胀量表和弱尺度之间存在足够大的层次结构,随着初始种子辐射生长到跟踪器溶液中,这始终将发生在LVS中。因此,在包含弱层次结构的稳定真空中结束结束的一致性要求使人们偏爱高通货膨胀量表 - 拟人论证(如果有人喜欢),对于大通货膨胀/弱层次结构。我们讨论初始种子辐射(或物质)的普遍和模型依赖性的各种起源。一个特别有趣的案例是由布雷恩通货膨胀引起的基本弦乐网络 - 这可能导致早期的时代,其中宇宙能量密度主要由引力波组成,而LVS的基本弦乐网络可在当今的宇宙中生存。

We study the overshoot problem in the context of post-inflationary string cosmology (in particular LVS). LVS cosmology features a long kination epoch as the volume modulus rolls down the exponential slope towards the final minimum, with an energy density that scales as $m_s^4$. This roll admits attractor tracker solutions, and if these are located the overshoot problem is solved. We show that, provided a sufficiently large hierarchy exists between the inflationary scale and the weak scale, this will always occur in LVS as initial seed radiation grows into the tracker solution. The consistency requirement of ending in a stable vacuum containing the weak hierarchy therefore gives a preference for high inflationary scales -- an anthropic argument, if one likes, for a large inflation/weak hierarchy. We discuss various origins, both universal and model-dependent, of the initial seed radiation (or matter). One particularly interesting case is that of a fundamental string network arising from brane inflation -- this may lead to an early epoch in which the universe energy density principally consists of gravitational waves, while an LVS fundamental string network survives into the present universe.

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