论文标题
关于希格斯通货膨胀的预热
On Preheating in Higgs Inflation
论文作者
论文摘要
最近，文献中已经讨论了较大的非最小耦合的希格斯通货膨胀的预热阶段的违规问题。我们指出，这个问题可以转化为无量纲有效耦合的强烈耦合问题，并且这些问题的存在很大程度上取决于选择高维操作员的选择，因为它们可以显着改变背景动力学和周围波动的规范归一化。相应地，预热的第一阶段产生的颗粒的典型能量可以保持与理论的截止量表相当。例如，我们在存在HIGGS字段的特定四源操作员的情况下数值计算粒子的产生，并确认上述语句。我们的论点也适用于与非最小耦合的多场通货膨胀。
Recently, the problem of unitarity violation during the preheating stage of Higgs inflation with a large non-minimal coupling has been much discussed in the literature. We point out that this problem can be translated into a strong coupling problem for the dimensionless effective coupling, and that the existence of these problems is highly dependent on the choice of higher-dimensional operators because they can significantly change the background dynamics and the canonical normalization of the fluctuations around it. Correspondingly, the typical energy of particles produced during the first stage of preheating can remain comparable to or below the cutoff scale of the theory. As an example, we numerically calculate the particle production in the presence of a specific four-derivative operator of the Higgs field, and confirm the statement above. Our argument also applies to multi-field inflation with non-minimal couplings.
