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What is a qubit, really?

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Can entanglement send messages faster than light?

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Q: Can entanglement send messages faster than light?

A: No. Entangled particles always give matching results, but neither side can choose what their particle will say: both just see randomness that happens to agree. Since you can't control the outcome, you can't spell out a message. The full story, with the magic-gloves picture, is in the Spooky Friends lesson. /course/basics/entanglement

Quantum, But Friendly

How Small Is Small?The Spinning CoinBit vs QubitSpooky Friends Final test

Inside a Quantum Computer

The Golden ChandelierHow It ThinksGood At, Bad At Final test

Quantum in the Real World

Quantum You Already OwnThe Great Quantum RaceFollowing the Quantum Money Final test

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Quantum Computing FoundationsQuantum Circuits, Algorithms, and IndustryFault-Tolerant Quantum Computing and Technical Strategy The full curriculum

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