论文标题
单光子存储的光干涉仪
Single-Photon Stored-Light Interferometry
论文作者
论文摘要
我们演示了单光子储存的光干涉仪，其中光子以rydberg polariton的形式存储在激光冷却原子集合中，其空间范围为$ 10 \ times1 \ times1 \times1μm^3 $。光子受拉西序列的约束，即“拆分”成两个路径的叠加。延迟多达450 ns后，将这两条路径重新组合，以取决于它们的相对相。 450 ns的叠加时间等于135 m的自由空间传播距离。我们表明，干涉仪条纹对外部场很敏感，并建议存储的光干涉法对局部感应应用可能是有用的。
We demonstrate a single-photon stored-light interferometer, where a photon is stored in a laser-cooled atomic ensemble in the form of a Rydberg polariton with a spatial extent of $10 \times1\times1μm^3$. The photon is subject to a Ramsey sequence, i.e. `split' into a superposition of two paths. After a delay of up to 450 ns, the two paths are recombined to give an output dependent on their relative phase. The superposition time of 450 ns is equivalent to a free-space propagation distance of 135 m. We show that the interferometer fringes are sensitive to external fields, and suggest that stored-light interferometry could be useful for localized sensing applications.
