论文标题
在通货膨胀期间产生增强的原始GW，并间歇性违反NEC和GW繁殖速度的降低
Generating enhanced primordial GWs during inflation with intermittent violation of NEC and diminishment of GW propagating speed
论文作者
论文摘要
我们研究了违反场景的无效状况（NEC）和$ C_T $ dimishishing方案，用于在通货膨胀期间产生增强的原始引力波（GWS）的功率谱，其中$ C_T $是原始GWS的传播速度。这两种情况都可以通过霍德斯基以外的理论稳定地实现，因此可以在有效的田间理论的框架内统一实现。我们假设通货膨胀宇宙经历了三个阶段，在中间阶段发生违反NEC或$ C_T $的减少，我们可以计算原始GW的功率谱。为NEC侵略方案提供了频谱模板。我们还讨论了这两种情况之间的潜在关系和差异，并具有错误的转换。
We investigate both the null energy condition (NEC) violating scenario and the $c_T$-diminishing scenario for generating enhanced power spectrum of primordial gravitational waves (GWs) during inflation, where $c_T$ is the propagating speed of primordial GWs. Both of these two scenarios can be realized stably with theories beyond Horndeski, hence can be uniformly implemented within the framework of the effective field theory. We calculate the power spectrum of primordial GWs by assuming that the inflationary Universe undergoes three phases, where the violation of NEC or the diminishment of $c_T$ occurs in the intermediate phase. A template of the spectrum is given for the NEC-violating scenario. We also discuss the underlying relation and discrepancy between these two scenarios with a disformal transformation.
