Ping Koy Lam

A calcium tungstate (CaWO₄) crystal is like a musical instrument: its atoms vibrate like strings, and these vibrations can 'drown out' fragile quantum information. To understand exactly how this happens, scientists bombarded the crystal with neutrons and recorded the response — producing a map of all possible vibrations, from low notes to very high ones.

An ordinary magnet is like a compass: its needle points north. But a quantum compass can look in both directions at once. If a magnet floating in a vacuum is gently spun, its electron 'tops' synchronize so the whole piece of metal starts living by the rules of the microworld — freezes in a superposition, like a split pointer.