论文标题
纳米格拉夫在通货膨胀期间信号是否有DS衰减的迹象？
Is the NANOGrav signal a hint of dS decay during inflation?
论文作者
论文摘要
正如Swampland的猜想所建议的那样，如果它根本存在，De Sitter（DS）空间可能会非常不稳定。在通货膨胀期间，短寿命的DS状态将通过一阶相变（PT）的级联反应衰减。我们发现，这种PT产生的重力波（GWS）将被随后的DS扩展“变红”，这可能会导致低频带的略带红色tilt随机GWS背景，并与纳米格拉夫12.5-ar的结果兼容。
As suggested by the swampland conjectures, de Sitter (dS) space might be highly unstable if it exists at all. During inflation, the short-lived dS states will decay through a cascade of the first-order phase transition (PT). We find that the gravitational waves (GWs) yielded by such a PT will be "reddened" by subsequent dS expansion, which may result in a slightly red-tilt stochastic GWs background at low-frequency band, compatible with the NANOGrav 12.5-yr result.
