论文标题
循环量子宇宙学中的重力颗粒产生
Gravitational Particle Production in Loop Quantum Cosmology
论文作者
论文摘要
我们研究了环路量子宇宙学（LQC）的弹跳阶段的重力颗粒产生。在LQC方案中，我们对粒子生产过程进行分析和数值分析，并在合同阶段具有束真空初始条件。我们得到的是，如果我们将穿着的度量方法的有效性延伸到了良好合理的小反应的极限之上，则此过程将导致在LQC的通货膨胀阶段中以辐射为主的相位。我们的结果表明，在穿着度量方法中使用的截断方案中所需的测试场近似可能不是在这种初始条件下的LQC方案中的有效假设。
We investigate the gravitational particle production in the bounce phase of Loop Quantum Cosmology (LQC). We perform both analytical and numerical analysis of the particle production process in a LQC scenario with Bunch-Davies vacuum initial condition in the contracting phase. We obtain that if we extend the validity of the dressed metric approach beyond the limit of small backreaction in which it is well justified, this process would lead to a radiation dominated phase in the pre-inflationary phase of LQC. Our results indicate that the test field approximation, which is required in the truncation scheme used in the dressed metric approach, might not be a valid assumption in a LQC scenario with such initial conditions.
