Quantum Drama: From the Bohr-Einstein Debate to the Riddle of Entanglement
Jim Baggott andJohn L. Heilbron
Published:
2024
Online ISBN:
9780191938498
Print ISBN:
9780192846105
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Quantum Drama: From the Bohr-Einstein Debate to the Riddle of Entanglement
Jim Baggott andJohn L. Heilbron
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Jim Baggott,
John L. Heilbron
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228–244
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April 2024
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Abstract
The participants at the Erice thinkfest learned from Zeilinger about neutron diffraction. Working with Michael Horne, Zeilinger built a neutron interferometer, and used it to perform EPR-type experiments with two interfering neutrons. In 1986 they were joined by Daniel Greenberger, and together devised experiments involving three entangled photons, for which the predictions of local hidden variables and quantum mechanics are mutually exclusive. Such states were produced in Zeilinger’s laboratory in 1998, and two years later confirmed the quantum predictions. As attention turned to the closure of ‘loopholes’, commercial prospects were being explored in experiments using an installed fibre-optic network, sending entangled photons 8-9 kilometres to two Swiss villages. In 2017, entangled photons were bounced from Micius, a dedicated experimental satellite, to ground stations in China 1100-1200 kilometres apart. Bell continued to rail against the orthodox interpretation of quantum measurement until his death in 1990. Bohm departed two years later.
Keywords: neutron diffraction and interference, three-photon GHZ states, locality loophole, efficiency loophole, freedom-of-choice loophole, RSA algorithm, quantum cryptography, quantum computing, quantum information
Subject
History of Physics
Collection: Oxford Scholarship Online
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