{"id":221823,"date":"2025-09-13T03:35:58","date_gmt":"2025-09-13T08:35:58","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2025\/09\/measuring-the-quantum-w-state-seeing-a-trio-of-entangled-photons-in-one-go"},"modified":"2025-09-13T03:35:58","modified_gmt":"2025-09-13T08:35:58","slug":"measuring-the-quantum-w-state-seeing-a-trio-of-entangled-photons-in-one-go","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2025\/09\/measuring-the-quantum-w-state-seeing-a-trio-of-entangled-photons-in-one-go","title":{"rendered":"Measuring the quantum W state: Seeing a trio of entangled photons in one go"},"content":{"rendered":"<p><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/measuring-the-quantum-w-state-seeing-a-trio-of-entangled-photons-in-one-go.jpg\"><\/a><\/p>\n<p>The concept of quantum entanglement is emblematic of the gap between classical and quantum physics. Referring to a situation in which it is impossible to describe the physics of each photon separately, this key characteristic of quantum mechanics defies the classical expectation that each particle should have a reality of its own, which gravely concerned Einstein.<\/p>\n<p>Understanding the potential of this concept is essential for the realization of powerful new quantum technologies.<\/p>\n<p>Developing such technologies will require the ability to freely generate a multi\u2013<a href=\"https:\/\/phys.org\/tags\/photon\/\" rel=\"tag\" class=\"\">photon<\/a> quantum <a href=\"https:\/\/phys.org\/tags\/entangled+state\/\" rel=\"tag\" class=\"\">entangled state<\/a>, and then to efficiently identify what kind of entangled state is present. However, when performing conventional quantum tomography, a method commonly used for state estimation, the number of measurements required grows exponentially with the number of photons, posing a significant data collection problem.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The concept of quantum entanglement is emblematic of the gap between classical and quantum physics. Referring to a situation in which it is impossible to describe the physics of each photon separately, this key characteristic of quantum mechanics defies the classical expectation that each particle should have a reality of its own, which gravely concerned [\u2026]<\/p>\n","protected":false},"author":427,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[48,1617],"tags":[],"class_list":["post-221823","post","type-post","status-publish","format-standard","hentry","category-particle-physics","category-quantum-physics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/221823","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=221823"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/221823\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=221823"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=221823"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=221823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}