论文标题
循环校正宇宙粒子创造
Loop corrections to a cosmological particle creation
论文作者
论文摘要
我们考虑了扩展的Friedmann-Lemaitre-Robertson-Walker Universe中巨大耦合标量场理论的动力学。我们考虑了共形时空的标准玩具模型，在遥远的过去和遥远的未来，保形因子变得恒定。采用Schwinger-keldysh图解技术，我们将红外循环校正计算为占领数和标量场的异常量子平均值，并表明这些校正随时间增长。使用这些观察结果，我们证明了遥远的未来的正则应力能量张量可获得大量量子校正，这些量子校正超过了对粒子通量的较长已知的树级贡献。
We consider dynamics of the massive minimally coupled scalar field theory in an expanding Friedmann-Lemaitre-Robertson-Walker universe. We consider the standard toy model of the conformally flat space-time where the conformal factor becomes constant at the distant past and the distant future. Employing Schwinger-Keldysh diagrammatic technique, we compute infrared loop corrections to the occupation number and anomalous quantum average of the scalar field and show that these corrections are growing with time. Using these observations, we demonstrate that the regularized stress-energy tensor at the distant future acquires substantial quantum corrections which exceed the long known tree-level contributions to the particle flux.
