论文标题
在通货膨胀期间，挤压重力量转化为光子
Conversion of squeezed gravitons into photons during inflation
论文作者
论文摘要
据信，在通货膨胀期间挤压了遗物重力。如果是这样，在当前干涉仪中，它们引起的量子噪声可以显着增强。但是，在宇宙历史上，引力的破坏可能会改变挤压程度。作为分析重力的破坏性的第一步，我们假设在通货膨胀开始时存在相当大的磁场，并且在重力群之间的最小偶联的情况下，在通货膨胀期间，挤压引力者在通货膨胀期间挤压了重力。我们通过扰动地求解了重力和光子的耦合系统的动力学演化，并通过数值和分析获得系统的挤压参数。事实证明，重力对宇宙学磁场引起的反熔性具有鲁棒性。我们还发现，重力转化为光子的转化率最多只有百分之几。
It is believed that relic gravitons are squeezed during inflation. If so, quantum noise induced by them can be significantly enhanced in current interferometers. However, decoherence of the gravitons during cosmic history may change the degree of squeezing. As a first step for analyzing the decoherence of the gravitons, we assume the presence of a sizable magnetic field at the beginning of inflation and study conversion processes of the squeezed gravitons into photons during inflation in the case of minimal coupling between gravitons and photons. We solve the dynamical evolution of a coupled system of gravitons and photons perturbatively and obtain squeezing parameters for the system numerically and analytically. It turns out that the gravitons are robust against the decoherence caused by the cosmological magnetic fields. We also find that the conversion rate of gravitons into photons is at a few percent at most.
