AI 中文总结
研究膨胀宇宙中引力波非线性相互作用，通过数值演化随机引力波系综，发现其谱随能量级联变化，不同振幅下的级联与四波散射模型预测的振幅缩放方式相符。
AI 中文摘要
本研究探索了膨胀宇宙中引力波之间的非线性相互作用。在宇宙学模型中对随机引力波系综进行数值演化，在模拟过程中其空间体积增加超过一个数量级。演化表明引力波谱随能量从初始谱峰值波长向更长和更短波长级联变化。不同引力波振幅下的演化产生的级联与引力波湍流的四波散射模型预测的振幅缩放方式一致。
英文摘要
This study explores the nonlinear interactions between gravitational waves in an expanding universe. Random ensembles of gravitational waves are evolved numerically in cosmological models whose spatial volumes increase by more than an order of magnitude during these simulations. These evolutions show the spectra of the gravitational waves evolving as energy cascades away from the wavelengths at the peak of the initial spectra toward both longer and shorter wavelengths. Evolutions performed at different gravitational wave amplitudes are shown to produce cascades that scale with amplitude in the way predicted by the four-wave scattering models of gravitational-wave turbulence.
Comments12 pages, 14 figures
