Peng Xue

In an empty concert hall, two musicians play a single part. First the violin, then the cello, or the other way around. It has always been this way: every note has its place in time, its own "earlier" and "later." But what if an orchestra could play both versions at once, in a quantum superposition of two orders?

Two musicians play a duet. In a perfect hall, they hear each other perfectly and gradually fall into resonance. But try playing in a room where someone keeps slamming the door. You'd think the rhythm would be thrown off. But no: sometimes that very random slam makes both of them sync up instantly.