标题： 早期宇宙中的动力系统和超弦相 显示英文标题

标题： Dynamical Systems and Superstring Phases in the Early Universe

摘要： 我们研究了体积标量在膨胀和再加热期间沿着指数势滚动的动力学，在宇宙超弦环的背景下。在LVS势的背景下，我们展示了存在一种新的弦环吸引子追踪解，其中宇宙能量密度的75%以基本宇宙超弦环气体的形式存在（这种配置优于标准的辐射追踪器）。在这个追踪器上，正是随着体积标量的演化，弦张力的持续减小使得这些环稳定而不会衰变。对于更一般的非LVS势，混合辐射-环追踪器也可能会出现。 显示英文摘要

摘要： We study the string theory dynamics of the volume scalar rolling down an exponential potential during the period between inflation and reheating, in a background of cosmic superstring loops. In the context of the LVS potential, we demonstrate the existence of a novel string loop attractor tracker solution, in which 75% of the energy density of the universe is in the form of a gas of fundamental cosmic superstring loops (a configuration preferred over the standard radiation tracker). On this tracker, it is the continual reduction in the string tension as the volume scalar evolves that makes the loops stable against decay. For more general non-LVS potentials, mixed radiation-loop trackers can also occur.