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Single Photon Reveals Quantum Entanglement of 16 Million Atoms

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Scientists have demonstrated entanglement between 16 million atoms in a crystal crossed by a single photon, reinforcing the quantum theory that entanglement can persist in macroscopic physical systems. The theoretical study of large-scale entanglement has to be followed by an experimental demonstration, consisting of two basic steps: the preparation of an entangled system and a subsequent appropriate measurement verifying the presence of entanglement. In the context of entanglement in large systems, the preparation of entanglement is generally simpler than its verification. This...Read full article

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