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quantum entanglement

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Riding the pilot wave

Pilot wave theory is an extension of quantum mechanics that doesn't exhibit any of that weird randomness or fuzziness. But that doesn't mean it's totally sane. Here is a quick introduction.
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Cracking codes, part II

In the second of two articles, Artur Ekert visits the strange subatomic world and investigates the possibility of unbreakable quantum cryptography.