标题： 引力波中域壁主导的情况 显示英文标题

标题： Gravitational Wave with Domain Wall Dominance

摘要： 畴壁（DWs）可以在离散对称性自发破缺时产生，而长寿命的畴壁可以主导宇宙的能量密度。 在这项工作中，我们探讨了早期宇宙中可能存在一个“畴壁主导（DWD）”阶段，并以畴壁衰变结束的可能性。 在DWD阶段，宇宙经历了一个标度因子的幂律加速膨胀，并且表现出相关频率模式的时间超视界演化。 我们表明这可能导致在随机引力波（GW）背景下留下独特的特征。 我们的研究为评估与DWD相关的GW发射提供了一个全面的框架，从而导致与其他宇宙学源相比具有明显不同的长寿命DW诱导的GW，这对未来的GW观测台具有重要意义。 显示英文摘要

摘要： Domain walls (DWs) can be produced when a discrete symmetry is spontaneously broken, and long-lived DWs can dominate the energy density of the universe. In this work, we explore the possibility that a "domain wall dominant (DWD)" phase existed in the early universe and ended with DW decay. During the DWD phase, the universe undergoes a power-law accelerated expansion of the scale factor and exhibits temporal superhorizon evolution of the relevant frequency modes. We show that this can lead to distinct features imprinted on the stochastic gravitational wave (GW) background. Our findings provide a comprehensive framework for evaluating GW emission associated with DWD, leading to distinguishable long-lived DW-induced GWs from other cosmological sources, with significant implications for future GW observatories.