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FIELD TRAIL · Foundations

Ideas that opened the field

Universal computation, Bell experiments and entanglement. Four sourced contributions to read in sequence.

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  1. STOP 1 OF 4 · Define universal quantum computation

    David Deutsch

    1985 · A universal quantum computer

    Deutsch formulated a quantum generalization of the universal computing machine and explored its relation to the Church–Turing principle. The paper connected questions about computation to the laws governing physical systems, rather than treating computation as independent of physics.

    Author of the 1985 universal quantum-computer paper.

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  2. STOP 2 OF 4 · Put Bell correlations to the test

    Alain Aspect

    1982 · Bell tests with changing measurement settings

    With Jean Dalibard and Gérard Roger, Aspect published a Bell-inequality experiment using time-varying analyzers. The work sharpened experimental tests of entanglement and the distinction between quantum correlations and local classical explanations. It was part of a sequence of experiments, with explicit experimental limitations.

    Coauthored experiment by Alain Aspect, Jean Dalibard and Gérard Roger.

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  3. STOP 3 OF 4 · Swap entanglement

    Anton Zeilinger

    1998 · Entangling photons that never interacted

    Zeilinger, Jian-Wei Pan, Dik Bouwmeester and Harald Weinfurter demonstrated entanglement swapping. A joint measurement on one photon from each of two pairs projected the remaining photons into an entangled state, although those photons had not interacted.

    Co-author with Jian-Wei Pan, Dik Bouwmeester and Harald Weinfurter.

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  4. STOP 4 OF 4 · Teleport a quantum state

    Charles H. Bennett

    1993 · Quantum teleportation

    Bennett, Brassard and four coauthors proposed transferring an unknown quantum state using shared entanglement, a measurement and classical communication. The protocol established a reusable quantum-information primitive and does not permit faster-than-light signaling or the copying of an arbitrary unknown state.

    Coauthored protocol by Charles H. Bennett, Gilles Brassard, Claude Crépeau, Richard Jozsa, Asher Peres and William K. Wootters.

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