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Finding quantum entanglement in a crowd

Researchers measure connections between photon pairs in beam of light

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8:00am, March 16, 2015

Intricate quantum connections between microscopic particles almost certainly underlie some phenomena perceivable at human scales. Now, for the first time, physicists have measured these connections, known as quantum entanglement, between pairs of photons within a macroscopic beam of light. It’s a step toward understanding how the rules of quantum mechanics scale up to phenomena such as superconductivity that involve large numbers of particles.

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