The power of many quantum technologies is rooted in quantum entanglement. Quantum particles like electrons or ion shave properties, such as spin, that can be precisely controlled and measured using lasers and other technologies. When quantum particles become entangled, their properties become correlated in a surprising way: While measuring the spin of each entangled particle individually yields random outcomes, examining the combined measurements reveals a striking connection: if one particle is observed to have a certain spin, the other particle will exhibit the opposite spin with certainty. This is a phenomenon that is unparalleled by anything in the classical world.

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