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- Loopholes_in_Bell_test_experiments abstract "In Bell test experiments, there may be problems of experimental design or set-up that affect the validity of the experimental findings. These problems are often referred to as \"loopholes\". See the article on Bell's theorem for the theoretical background to these experimental efforts (see also J.S. Bell). The purpose of the experiment is to test whether nature is best described using a local hidden variable theory or by the quantum entanglement theory of quantum mechanics.The \"detection efficiency\", or \"fair sampling\" problem is the most prevalent loophole in optical experiments. Another loophole that has more often been addressed is that of communication, i.e. locality. There is also the \"disjoint measurement\" loophole which entails multiple samples used to obtain correlations as compared to \"joint measurement\" where a single sample is used to obtain all correlations used in an inequality. To date, no test has simultaneously closed all loopholes.Ronald Hanson of Delft University of Technology claims the first Bell experiment that closes both the detection and the communication loopholes. (This was not an optical experiment in the sense discussed below; the entangled degrees of freedom were electron spins rather than photon polarization.) Nevertheless, correlations of classical optical fields also violate Bell's inequality.In some experiments there may be additional defects that make \"local realist\" explanations of Bell test violations possible; these are briefly described below.Many modern experiments are directed at detecting quantum entanglement rather than ruling out local hidden variable theories, and these tasks are different since the former accepts quantum mechanics at the outset (no entanglement without quantum mechanics). This is regularly done using Bell's theorem, but in this situation the theorem is used as an entanglement witness, a dividing line between entangled quantum states and separable quantum states, and is as such not as sensitive to the problems described here. In October 2015, scientists from the Kavli Institute of Nanoscience reported that the Quantum nonlocality phenomenon is supported at the 96% confidence level based on a \"loophole-free Bell test\" study. These results were confirmed by two studies with statistical significance over 5 standard deviations which were published in December 2015.".
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- Loopholes_in_Bell_test_experiments wikiPageRevisionID "707293881".
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Alain_Aspect.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Bell_test_experiments.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Bells_theorem.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink CHSH_inequality.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Category:Quantum_measurement.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Entanglement_witness.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink John_Stewart_Bell.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Kavli_Institute_of_Nanoscience.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Local_hidden_variable_theory.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Principle_of_locality.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Quantum_entanglement.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Quantum_mechanics.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Quantum_nonlocality.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink Superdeterminism.
- Loopholes_in_Bell_test_experiments wikiPageWikiLink File:Two_channel_bell_test.svg.
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText ""no enhancement"".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "Loopholes in Bell test experiments".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "assumptions".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "fair sampling loophole".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "loophole".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "loophole-free Bell test".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "loopholes in actual experiments".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "loopholes in experimental Bell tests".
- Loopholes_in_Bell_test_experiments wikiPageWikiLinkText "loopholes".
- Loopholes_in_Bell_test_experiments wikiPageUsesTemplate Template:Citation.
- Loopholes_in_Bell_test_experiments wikiPageUsesTemplate Template:Citation_needed.
- Loopholes_in_Bell_test_experiments wikiPageUsesTemplate Template:Reflist.
- Loopholes_in_Bell_test_experiments wikiPageUsesTemplate Template:Unreferenced_section.
- Loopholes_in_Bell_test_experiments subject Category:Quantum_measurement.
- Loopholes_in_Bell_test_experiments type Mechanic.
- Loopholes_in_Bell_test_experiments comment "In Bell test experiments, there may be problems of experimental design or set-up that affect the validity of the experimental findings. These problems are often referred to as \"loopholes\". See the article on Bell's theorem for the theoretical background to these experimental efforts (see also J.S. Bell).".
- Loopholes_in_Bell_test_experiments label "Loopholes in Bell test experiments".
- Loopholes_in_Bell_test_experiments sameAs Q6675880.
- Loopholes_in_Bell_test_experiments sameAs Q6675880.
- Loopholes_in_Bell_test_experiments wasDerivedFrom Loopholes_in_Bell_test_experiments?oldid=707293881.
- Loopholes_in_Bell_test_experiments isPrimaryTopicOf Loopholes_in_Bell_test_experiments.