First Map Made of a Solid’s Secret Quantum Geometry

Famously, at the quantum scale, particles can be in multiple possible locations at once. A particle’s state spreads out like a wave, peaking where the particle is likely to be found. When you measure its position, this spread-out state, known as a wave function, transforms into a single definite location. The full shape of the wave function long evaded detection, since trying to measure it will…

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