{"id":1494,"date":"2024-09-24T16:12:54","date_gmt":"2024-09-24T16:12:54","guid":{"rendered":"https:\/\/qpr.ca\/blogs\/physics\/?p=1494"},"modified":"2024-09-24T16:12:54","modified_gmt":"2024-09-24T16:12:54","slug":"bertlmanns-gloves-yet-again-on-quora","status":"publish","type":"post","link":"https:\/\/qpr.ca\/blogs\/physics\/2024\/09\/24\/bertlmanns-gloves-yet-again-on-quora\/","title":{"rendered":"Bertlmann&#8217;s Gloves (yet again on Quora)"},"content":{"rendered":"<p><strong>Can quantum entanglement can be looked at as a example of glove manufacturing? They are produced in pairs, and if without looking we send them to different parts of universe, once opened, one will always be left and other right? If not why not?<\/strong><\/p>\n<p class=\"q-text qu-display--block qu-wordBreak--break-word qu-textAlign--start\">NO. The idea that every electron has a spin direction of its own, which does not become apparent until we view it but is always there (like the handedness of a glove), IS compatible with what we observe if we only ever measure spin components along one axis, but it is NOT compatible with what we observe when we measure spins in directions that are not either parallel or perpendicular.<\/p>\n<p class=\"q-text qu-display--block qu-wordBreak--break-word qu-textAlign--start\">There is nothing \u201cspooky\u201d about the fact that measuring the spin of one electron from a pair immediately tells us (but not a distant observer of the other electron) what the distant observer will see IF they measure the spin in the same direction. But what IS \u201cspooky\u201d is that it allows us to predict the result of a measurement of the remote electron at say 45 degrees to the one we measured with greater confidence than would be possible with ANY pre-assigned set of spin values in all directions.<\/p>\n<p class=\"q-text qu-display--block qu-wordBreak--break-word qu-textAlign--start\">See\u00a0<a class=\"q-box qu-cursor--pointer qu-hover--textDecoration--underline b2c1r2a puppeteer_test_link\" title=\"cds.cern.ch\" href=\"https:\/\/cds.cern.ch\/record\/142461\/files\/198009299.pdf\" target=\"_blank\" rel=\"noopener nofollow\">this famous paper by John Bell<\/a>\u00a0for a colourful illustration of these ideas.<\/p>\n<p>Source: <em><a href=\"https:\/\/www.quora.com\/Can-quantum-entanglement-can-be-looked-at-as-a-example-of-glove-manufacturing-They-are-produced-in-pairs-and-if-without-looking-we-send-them-to-different-parts-of-universe-once-opened-one-will-always-be-left-and\/answer\/Alan-Cooper-5\">(1002) Alan Cooper&#8217;s answer to Can quantum entanglement can be looked at as a example of glove manufacturing? They are produced in pairs, and if without looking we send them to different parts of universe, once opened, one will always be left and other right? If not why not? &#8211; Quora<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Can quantum entanglement can be looked at as a example of glove manufacturing? They are produced in pairs, and if without looking we send them to different parts of universe, once opened, one will always be left and other right? If not why not? NO. The idea that every electron has a spin direction of &hellip; <a href=\"https:\/\/qpr.ca\/blogs\/physics\/2024\/09\/24\/bertlmanns-gloves-yet-again-on-quora\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Bertlmann&#8217;s Gloves (yet again on Quora)<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topics":[],"class_list":["post-1494","post","type-post","status-publish","format-standard","hentry","category-all"],"_links":{"self":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1494","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/comments?post=1494"}],"version-history":[{"count":1,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1494\/revisions"}],"predecessor-version":[{"id":1496,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1494\/revisions\/1496"}],"wp:attachment":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/media?parent=1494"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/categories?post=1494"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/tags?post=1494"},{"taxonomy":"topics","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/topics?post=1494"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}