早宇宙中超弦相变产生的高频引力波

当模量在早期宇宙中滚动时，所有物理尺度——包括弦张力——都会同时演化。具有时变张力的宇宙弦环的动力学可以产生宇宙弦环跟踪器，其中宇宙能量密度的主要部分以弦环的形式存在。该解可作为吸引子存在，直到滚动的模量到达其最小值时，环最终通过引力波辐射衰减。我们探讨了由此类弦环跟踪器产生的引力波谱。 resulting spectrum is high-frequency and peaks in the GHz regime today. The amplitude of the signal is diluted by any subsequent matter-dominated epochs, and thus the potential observability of the signal crucially depends on the duration of the moduli-dominated epoch that follows once the moduli settle down and oscillate about their minimum.