{"id":232520,"date":"2026-03-04T01:21:37","date_gmt":"2026-03-04T07:21:37","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/03\/a-new-uncertainty-relation-for-quantum-measurement-errors"},"modified":"2026-03-04T01:21:37","modified_gmt":"2026-03-04T07:21:37","slug":"a-new-uncertainty-relation-for-quantum-measurement-errors","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/03\/a-new-uncertainty-relation-for-quantum-measurement-errors","title":{"rendered":"A new \u2018uncertainty relation\u2019 for quantum measurement errors"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/a-new-uncertainty-relation-for-quantum-measurement-errors2.jpg\"><\/a><\/p>\n<p>One of the most striking features of quantum physics is that certain properties cannot be measured at the same time. Every measurement may inevitably affect the object\u2019s physical state being measured\u2014and therefore also the outcome of any subsequent measurement. How fast something is moving, for example, can depend on whether its position was measured beforehand.<\/p>\n<p>How strongly a measurement intervenes in the quantum state determines how reliably the result of a second measurement can be predicted from the first. This qualitative connection has been known for a long time. What is new, however, is that researchers at TU Wien have now found a formula that allows this effect to be quantified exactly.<\/p>\n<p>They discovered a simple \u201cuncertainty relation\u201d that links measurement disturbance and measurement correlation. Using this relation, it becomes possible in a remarkably straightforward way to determine which combinations of quantum operations are possible\u2014and which are fundamentally excluded. Their paper is <a href=\"https:\/\/link.aps.org\/doi\/10.1103\/llgb-gql9\" target=\"_blank\">published<\/a> in the journal Physical Review Research.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>One of the most striking features of quantum physics is that certain properties cannot be measured at the same time. Every measurement may inevitably affect the object\u2019s physical state being measured\u2014and therefore also the outcome of any subsequent measurement. How fast something is moving, for example, can depend on whether its position was measured beforehand. [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1617],"tags":[],"class_list":["post-232520","post","type-post","status-publish","format-standard","hentry","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/232520","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/427"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=232520"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/232520\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=232520"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=232520"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=232520"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}