标题： 扩展准单场暴胀中的施温格-凯尔迪什机制 显示英文标题

标题： Schwinger-Keldysh mechanism in extended quasi single field inflation

摘要： 我们研究了准单场膨胀模型的扩展，其中包含多个半重子等曲率扰动场，并使用了施温格-凯尔迪许机制。我们计算了双谱和三谱的幅度与形状。我们表明，与标准的 in-in 形式相比，与施温格-凯尔迪许机制相关的图解方法大大简化了分析过程。此方法有助于研究膨胀期间轻量场和半重子场的质量和耦合光谱。 显示英文摘要

摘要： We study an extension of quasi-single field model of inflation containing multiple semi-heavy isocurvaton fields using the Schwinger-Keldysh mechanism. We calculate the amplitudes and the shapes of the bispectrum and the trispectrum. We show that the diagrammatic approach associated with the Schwinger-Keldysh mechanism simplifies the analysis considerably compared to standard in-in formalism. This method is helpful to study the spectroscopy of masses and couplings of light and semi-heavy fields during inflation.