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In quantum mechanics, a quantum eraser experiment is an interferometer experiment that demonstrates several fundamental aspects of quantum mechanics, including quantum entanglement and complementarity. [1] [2]: 328 The quantum eraser experiment is a variation of Thomas Young's classic double-slit experiment. It establishes that when action is ...
Versions of the quantum eraser using entangled photons, however, are intrinsically non-classical. Because of that, in order to avoid any possible ambiguity concerning the quantum versus classical interpretation, most experimenters have opted to use nonclassical entangled-photon light sources to demonstrate quantum erasers with no classical analog.
English: Schematic diagram following one in "A double-slit quantum eraser" by Walborn, Cunha, Pádua, and Monken. In this configuration the polarizer (POL1) inserted in the path leading to the detector in the signal path causes opposing circular polarizations to emerge in both paths leading from the double slits, allowing photon self-interference to occur at the detector screen and permitting ...
Cosmic versions of the delayed-choice use photons emitted billions of years ago; the results are unchanged. [3] The concept of delayed choice has been productive of many revealing experiments. [4] New versions of the delayed choice concept use quantum effects to control the "choices", leading to quantum delayed-choice experiments.
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Quantum eraser experiments demonstrate that wave behavior can be restored by erasing or otherwise making permanently unavailable the "which path" information. A simple do-it-at-home illustration of the quantum eraser phenomenon was given in an article in Scientific American . [ 56 ]
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