A mechanism for smearing of the primordial gravitational waves during the radiation-dominated phase of the evolution of the Universe is considered. It is shown that the primordial gravitational waves can possess hyperbolicity features due to their propagation through the matter inhomogeneities. This mechanism of smearing can lead to the flattening of the original gravitational wave spectrum and hence has to be taken into account at the interpretation of the properties of primordial gravitational background on the detection of which are oriented ongoing and forthcoming experimental facilities.

中文翻译：

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原初引力波的涂抹

考虑了宇宙演化的辐射主导阶段中原始引力波的涂抹机制。结果表明，原初引力波由于通过物质不均匀性传播而具有双曲性特征。这种拖尾机制会导致原始引力波谱变平，因此在解释原始引力背景的特性时必须考虑到这种拖尾效应，其检测是面向正在进行和即将进行的实验设施的。