论文标题
探测单个原子水平附近的玻色网凝结物中的自旋相关性
Probing spin correlations in a Bose-Einstein condensate near the single atom level
论文作者
论文摘要
使用shapiro型共振引起的参数转化率，我们在钠旋转1 Bose-Einstein冷凝物中产生和表征两模式的挤压真空状态。旋转变化的碰撞生成$ m = \ pm中的原子的相关对成对1 $ zeeman状态从最初所有原子$ m = 0 $的冷凝物中出发。一种具有灵敏度的新型荧光成像技术$Δn\ SIM 1.6 $ ATOM使我们能够证明量子波动在初始动力学中的作用，并表征最终状态的完整分布。假设所有原子具有相同的空间波函数，我们推断出15.3 \，dB的挤压参数。
Using parametric conversion induced by a Shapiro-type resonance, we produce and characterize a two-mode squeezed vacuum state in a sodium spin 1 Bose-Einstein condensate. Spin-changing collisions generate correlated pairs of atoms in the $m=\pm 1$ Zeeman states out of a condensate with initially all atoms in $m=0$. A novel fluorescence imaging technique with sensitivity $ΔN \sim 1.6$ atom enables us to demonstrate the role of quantum fluctuations in the initial dynamics and to characterize the full distribution of the final state. Assuming that all atoms share the same spatial wave function, we infer a squeezing parameter of 15.3\,dB.
