论文标题
相关的稳态和拉曼在连续泵送和探测的原子集合中激光
Correlated steady states and Raman lasing in continuously pumped and probed atomic ensembles
论文作者
论文摘要
基于法拉第相互作用的光探测的自旋偏振原子集合是用于量子计量和量子信息处理中众多应用的多功能平台。在这里，我们考虑了一个碱性原子的合奏，这些集合是连续光学泵送和探测的。由于光子在较大的光学深度上的集体散射，原子的稳态不如通常假定的不相关张量产品对应。我们引入了一种自洽的方法，以考虑原子的多级结构，以近似于稳态（包括对相关性）。我们发现并描述了拉曼激光的政权，类似于超级激光的模型。我们确定集体散射光子的光谱，这也表征了集体旋转激励在固定相关平均场状态之上的相干时间，与计量和量子信息的应用有关。
Spin-polarised atomic ensembles probed by light based on the Faraday interaction are a versatile platform for numerous applications in quantum metrology and quantum information processing. Here we consider an ensemble of Alkali atoms that are continuously optically pumped and probed. Due to the collective scattering of photons at large optical depth, the steady state of atoms does not correspond to an uncorrelated tensor-product state, as is usually assumed. We introduce a self-consistent method to approximate the steady state including the pair correlations, taking into account the multilevel structure of atoms. We find and characterize regimes of Raman lasing, akin to the model of a superradiant laser. We determine the spectrum of the collectively scattered photons, which also characterises the coherence time of the collective spin excitations on top of the stationary correlated mean-field state, as relevant for applications in metrology and quantum information.
