论文标题
观察冷原子的定向传播中随机共振
Observation of stochastic resonance in directed propagation of cold atoms
论文作者
论文摘要
限制在耗散光学晶格中的随机扩散原子被弱的光探针照亮。探针传递光谱揭示了垂直于探针束传播方向的定向原子传播。当我们改变随机光子散射速率时，观察到这种定向传播的共振增强。我们在实验上表征了这种随机共振，这是探针强度和晶格深度的函数。一个简单的模型揭示了探测激发的原子密度波和光泵率如何在随机扩散样品中创建定向的原子传播。
Randomly diffusing atoms confined in a dissipative optical lattice are illuminated by a weak probe of light. The probe transmission spectrum reveals directed atomic propagation that occurs perpendicular to the direction of probe beam propagation. Resonant enhancement of this directed propagation is observed as we vary the random photon scattering rate. We experimentally characterize this stochastic resonance as a function of probe intensity and lattice well depth. A simple model reveals how the probe-excited atomic density waves and optical pumping rates conspire to create directed atomic propagation within a randomly diffusing sample.
