标题： 具有Weyl对称性的暴胀预热引力波 显示英文标题

标题： Gravitational Waves from Preheating in Inflation with Weyl Symmetry

摘要： 具有共形Weyl对称性的暴胀提供了一种可行的情景，可以生成几乎尺度不变的原初密度涨落以及暗物质候选者。 这里我们指出，在这种暴胀模型中，除了来自量子涨落的原初引力波（GW）外，预热过程中产生的高频引力波也可以作为暴胀动力学的另一种探测手段。 我们在一个典型模型中进行了线性解析分析和非线性数值格点模拟。 我们发现显著的随机引力波可以被产生，并且其频率范围位于$10^8$ Hz 到$\sim$ $10^9$ Hz 左右，这可能通过未来的共振腔实验探测到。 显示英文摘要

摘要： Inflation with Weyl scaling symmetry provides a viable scenario that can generate both the nearly scaling invariant primordial density fluctuation and a dark matter candidate. Here we point out that, in additional to the primordial gravitational waves (GWs) from quantum fluctuations, the production of high-frequency GWs from preheating in such inflation models can provide an another probe of the inflationary dynamics. We conduct both linear analytical analysis and nonlinear numerical lattice simulation in a typical model. We find that significant stochastic GWs can be produced and the frequency band is located around $10^8$ Hz $\sim$ $10^9$ Hz, which might be probed by future resonance-cavity experiments.