Instability threshold in a large balanced magneto-optical trap
Instability threshold in a large balanced magneto-optical trap
复制标题
大型平衡磁光陷阱中的不稳定性阈值
作者：
M. Gaudesius;R. Kaiser;G. Labeyrie;Yong;T. Pohl
当捕获激光的频率接近原子共振时，在磁光囚禁中制备的大团冷原子云会产生时空不稳定性。该系统与囚禁等离子体有密切的相似之处，有效的库仑相互作用是由散射光子的交换引起的，并导致囚禁原子的集体非线性动力学。本文报道了不稳定性阈值的详细实验研究，并与激光驱动的相互作用云的三维模拟进行了比较。
Large clouds of cold atoms prepared in a magneto-optical trap can develop spatio-temporal instabilities when the frequency of the trapping lasers is brought close to the atomic resonance. This system bears close similarities with trapped plasmas, whereby effective Coulomb interactions are induced by the exchange of scattered photons and lead to collective nonlinear dynamics of the trapped atoms. We report in this paper a detailed experimental study of the instability threshold, and comparisons with three-dimensional simulations of the interacting, laser-driven cloud.