{"id":55402,"date":"2024-05-21T13:23:24","date_gmt":"2024-05-21T13:23:24","guid":{"rendered":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/05\/21\/the-neutrinos-quantum-fuzziness-is-beginning-to-come-into-focus\/"},"modified":"2024-05-21T13:23:24","modified_gmt":"2024-05-21T13:23:24","slug":"the-neutrinos-quantum-fuzziness-is-beginning-to-come-into-focus","status":"publish","type":"post","link":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/05\/21\/the-neutrinos-quantum-fuzziness-is-beginning-to-come-into-focus\/","title":{"rendered":"The neutrino\u2019s quantum fuzziness is beginning to come into focus"},"content":{"rendered":"<div style=\"text-align:center\"><\/div> \r\n<br><br><div data-component=\"video-embed\">\n\t\t\t\t\n\n\n\n\n<p>Neutrinos are known for funny business. Now scientists have set a new limit on a quantum trait responsible for the subatomic particles\u2019 quirkiness: uncertainty.<\/p>\n\n\n\n<p>The lightweight particles morph from one variety of neutrino to another as they travel, a strange phenomenon called\u00a0<a href=\"https:\/\/www.sciencenews.org\/article\/neutrinos-identity-shift-snares-physics-nobel\">neutrino oscillation<\/a>\u00a0(<em>SN: 10\/6\/15<\/em>). That ability rests on quantum uncertainty, a sort of fuzziness intrinsic to the properties of quantum objects, such as their location or momentum. But despite the importance of quantum uncertainty, the uncertainty in the neutrino\u2019s position has never been directly measured.\u00a0<\/p>\n\n\n<aside class=\"sn-conversion rich-text rich-text--with-sidebar\">\n<style><![CDATA[\n.email-conversion {\n  border: 1px solid #ffcccb;\n  color: white;\n  margin-top: 50px;\n  background-image: url(\"\/wp-content\/themes\/sciencenews\/client\/src\/images\/cta-module@2x.jpg\");\n  padding: 20px;\n  clear: both;\n}\n\n]]><\/style>\n\n\n\n                        <style class=\"is-layout-flow 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  color: white;\n    font-weight: bold;\n}]]><\/style>\n                        \n                        \n<\/aside>\n\n\n<p>\u201cThe \u2018quantum properties of the neutrino\u2019 stuff is a little bit of the Wild West at the moment,\u201d says nuclear physicist Kyle Leach of Colorado School of Mines in Golden. \u201cWe\u2019re still trying to figure it out.\u201d<\/p><p>It\u2019s impossible to know everything about a quantum particle.\u00a0<a href=\"https:\/\/www.sciencenews.org\/article\/quantum-theory-history-reality-uncertainty-physics\">Heisenberg\u2019s uncertainty principle<\/a>\u00a0famously states that it\u2019s futile to attempt to precisely determine both the momentum of a quantum object and its position (<em>SN: 1\/12\/22<\/em>). Now, Leach and colleagues report new details about the size of the neutrino\u2019s wave packet, which indicates the uncertainty in the particle\u2019s position.\u00a0<\/p>\n\n\n\n<p>Quantum particles travel as waves, with ripples that are related to the probability of finding a particle at a given location. A wave packet is the set of ripples corresponding to a single particle. The new experiment\u00a0<a href=\"https:\/\/arxiv.org\/abs\/2404.03102\" target=\"_blank\" rel=\"noopener\">sets a limit on the size of the wave packet<\/a>\u00a0for neutrinos produced in a particular type of radioactive decay, Leach\u2019s team reports in a paper submitted April 3 to arXiv.org. The particles have a wave packet size of at least 6.2 trillionths of a meter.<\/p>\n\n\n\n<p>The researchers studied neutrinos produced in the decay of beryllium-7, via a process called electron capture. In this process, a beryllium-7 nucleus absorbs an electron, and the atom transforms into lithium-7 and spits out a neutrino.\u00a0<\/p>\n\n\n\n<p>The team implanted beryllium-7 atoms in a highly sensitive device made from five layers of material, including superconducting tantalum, which can transmit electricity without resistance. In the decay, the newly produced lithium-7 recoils away from the neutrino. When cooled to 0.1 degrees above absolute zero (\u2013273.05\u00b0 Celsius), the device allowed the researchers to detect the energy of that recoil. The spread in the energy of the lithium atoms revealed the neutrino wave packet\u2019s minimum size.<\/p>\n\n\n\n<p>Neutrinos are special in that they interact so rarely with matter that they maintain their quantum properties over long distances. Most quantum effects take place on very small scales, but neutrino oscillations occur over thousands of kilometers.<\/p>\n\n\n\n<p>So studying the size of neutrinos\u2019 wave packets could help unveil the connection between the everyday world of classical physics and the strangeness of quantum physics, says Benjamin Jones, a neutrino physicist at the University of Texas at Arlington who was not involved with the experiment. \u201cIf you can predict something like this and then measure it, then you really validate some of the ideas that people have about how the classical world emerges from an underlying quantum reality,\u201d he says. \u201cAnd that\u2019s what really got me excited about this in the first place.\u201d\u00a0<\/p>\n\n\n\n<p>In another study, submitted April 30 to arXiv.org, Jones and his colleagues\u00a0<a href=\"https:\/\/arxiv.org\/abs\/2404.19746\" target=\"_blank\" rel=\"noopener\">theoretically predicted the size of the neutrino wave packet<\/a>, pegging it at about 2.7 billionths of a meter. Now it\u2019s up to experimental physicists to try to measure it, not just determine its minimum size.<\/p>\n\n\n\n<p>Measuring the size of neutrinos\u2019 wave packets might help resolve discrepancies among past experiments, and potentially point the way to new types of subatomic particles still to be discovered. But the size of the neutrino\u2019s wave packet depends on how the particle is produced. So it\u2019s not clear how the size limit observed in Leach\u2019s study might translate to neutrinos produced by other means, says neutrino physicist Carlos Arg\u00fcelles of Harvard University. For example, many experiments observe neutrinos from nuclear reactors, but those are produced via a different type of radioactive decay.<\/p>\n\n\n\n<p>Still, Arg\u00fcelles says, \u201cthe study of the neutrino wave packet has fundamental implications in the quantumness of the neutrino, and the quantumness of the neutrino is actually what makes neutrinos interesting. It\u2019s the most unique property that they have.\u201d<\/p>\n\n\n\n\t\t\t<\/div>\r\n<br>\r\n<br><a href=\"https:\/\/www.sciencenews.org\/article\/neutrinos-quantum-fuzziness-uncertainty\">Source link <\/a>","protected":false},"excerpt":{"rendered":"<p>Neutrinos are known for funny business. Now scientists have set a new limit on a quantum trait responsible for the subatomic particles\u2019 quirkiness: uncertainty. The lightweight particles morph from one variety of neutrino to another as they travel, a strange phenomenon called\u00a0neutrino oscillation\u00a0(SN: 10\/6\/15). That ability rests on quantum uncertainty, a sort of fuzziness intrinsic [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":55403,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","fifu_image_url":"https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/05\/051424_ec_neutrino-size_feat.jpg?fit=800%2C450&ssl=1","fifu_image_alt":"","footnotes":""},"categories":[606],"tags":[10391,5711,54682,54681,7338],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/55402"}],"collection":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/comments?post=55402"}],"version-history":[{"count":1,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/55402\/revisions"}],"predecessor-version":[{"id":55404,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/55402\/revisions\/55404"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media\/55403"}],"wp:attachment":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media?parent=55402"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/categories?post=55402"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/tags?post=55402"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}