论文标题
在宇宙弦背景中原子的两光子自发发射
Two-photon spontaneous emission of an atom in a cosmic string background
论文作者
论文摘要
众所周知，原子系统的泡沫可能会大大影响其辐射特性。在这项工作中，我们考虑了宇宙弦背景在激发原子的自发发射中的影响。我们首先计算量子发射极的单光子自发发射速率，这是一个狭窄的频带过程，然后我们分析了两光子自发发射的更复杂的案例，这是一个宽带和更丰富的现象。在前一种情况下，我们不仅分析了从原子到弦的距离的衰减速率的行为，还与与宇宙弦指标相关的缺陷角度分析。在后一种情况下，我们表明发射光子的光谱分布基本上受宇宙弦背景的影响。
It is well known that the vicinities of an atomic system may substantially affect its radiative properties. In this work, we consider the influence of a cosmic string background in the spontaneous emission of an excited atom. We start by computing the one-photon spontaneous emission rate of a quantum emitter, which is a narrow band process, and then we analyze the more complex case of the two-photon spontaneous emission, which is a broad band and much richer phenomenon. In the former case, we analyze not only the behavior of the decay rate with the distance from the atom to the string, but also with the deficit angle associated with the cosmic string metric. In the latter case, we show that the spectral distribution of the emitted photons is substantially affected by the cosmic string background.
