The manipulation of the quantum properties of light involves its technically challenging strong interaction with matter. Now, an experiment shows that when light propagates through a waveguide it only takes a weakly coupled line of atoms to single out its photons, or bunch them together, unveiling and controlling its quantum nature.

中文翻译：

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为非经典提供指导

光的量子性质的操纵涉及其在技术上具有挑战性的与物质的强相互作用。现在，一项实验表明，当光通过波导传播时，只需要一条弱耦合的原子线就能分离出光子，或者将它们束在一起，从而揭示并控制其量子性质。