On the expected production of gravitational waves during preheating
On the expected production of gravitational waves during preheating
复制标题
关于预热期间引力波的预期产生
DOI：
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发表时间：
2019
影响因子：
6.4
通讯作者：
C. Armendariz
中科院分区：
文献类型：
--
作者：
C. Armendariz
现有的对预热过程中产生的引力波能量密度的预测主要依赖于计算机模拟，其中物质场的不均匀性基本上表现为经典。在这篇文章中，我们遵循的是一个完整的量子处理的过程中的形式主义。我们使用这种方法来确定所产生的引力波的预期密度，并在一个简单的标量场模型中数值估计其值，忽略反作用。特别注意的是专门的正规化和重整化的分歧，出现在形式主义。我们还讨论了我们的方法如何与文献中使用的传统计算进行比较，以及在依赖于数值模拟的引力波产生的传统分析中可能遗漏哪些元素。在参数共振是有效的情况下，我们的结果同意从数值模拟，预期的预测。然而，在足够低的值的共振参数，数值模拟失败，而我们的方法仍然适用。
The existing predictions of the energy density of gravitational waves produced during preheating mostly rely on computer simulations in which the matter field inhomogeneities essentially behave classically. In this article we follow instead a full quantum treatment of the process within the in-in formalism. We use this approach to determine the expected density of the produced gravitational waves and numerically estimate its value in a simple scalar field model, neglecting backreaction. Particular attention is devoted to the regularization and renormalization of the divergences that appear in the in-in formalism. We also address how our approach compares with the conventional calculations used in the literature, and what elements could be missed in the conventional analyses of gravitational wave production that rely on numerical simulations. In the cases in which parametric resonance is effective, our results agree with the predictions expected from numerical simulations, as anticipated. At sufficiently low values of the resonance parameter, however, numerical simulations fail, while our approach remains applicable.
影响因子：
2.1
作者：
Duncan A. Brown;K. Vahi;M. Taufer;Von Welch;E. Deelman;Lorena A. Barba;George K. Thiruvathukal
通讯作者：
Duncan A. Brown;K. Vahi;M. Taufer;Von Welch;E. Deelman;Lorena A. Barba;George K. Thiruvathukal
影响因子：
8.6
作者：
Abbott, B. P.;Abbott, R.;Zweizig, J.
通讯作者：
Zweizig, J.