论文标题
磁场引起的量子纠缠对原始重力波的影响
Impact of quantum entanglement induced by magnetic fields on primordial gravitational waves
论文作者
论文摘要
存在观察证据，可以相信在通货膨胀期间产生的原始磁场的存在。我们在膨胀期间研究原始重力波（PGW），在仪表动力学偶联的磁场存在下。在模型中，不仅将重力作为PGW的激发，而且还高度挤压了作为电磁场激发的光子。他们通过重力与光子转换彼此纠缠，反之亦然。我们得出了重力子的降低密度矩阵，并计算其纠缠熵。事实证明，吸引力的状态不是挤压状态，而是一种混合状态。尽管目睹这种纠缠是目前不可行的，但这将是一个重要的实验挑战。
There exist observational evidence to believe the existence of primordial magnetic fields generated during inflation. We study primordial gravitational waves (PGWs) during inflation in the presence of magnetic fields sustained by a gauge kinetic coupling. In the model, not only gravitons as excitations of PGWs, but also photons as excitations of electromagnetic fields are highly squeezed. They become entangled with each other through graviton to photon conversion and vice versa. We derive the reduced density matrix for the gravitons and calculate their entanglement entropy. It turns out that the state of the gravitons is not a squeezed state but a mixed state. Although witnessing such an entanglement is not feasible at present, it would be an important experimental challenge.
