When I think of a tractor beam – a stream of energy that can move objects – I imagine a ray emerging from a spaceship gripping an object outside and pulling it in. In my mind this spaceship is the Starship Enterprise from Star Trek, but the idea has been used in countless science fiction plots. But in the last few decades, the concept has also gathered attention from scientists and engineers. Despite advances, it has, however, proven difficult to build a tractor beam that can move real-life objects in a controlled way. But in our new study, published in…
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