Quantum Mechanics is not a single theory. In the past there have been other attempts to describe the fundamental aspects of physics which used the word \u201cquantum\u201d in various different senses, but to most physicists nowadays it is a class of theories characterized by the property of having the \u201cpure states\u201d of an isolated system represented by rank one projectors (or equivalently rays or unit vectors) in a complex Hilbert space – and by a rule for predicting the probability distributions of outcomes for various possible experimental observations. Each such theory is internally consistent, but that doesn\u2019t mean either that they are necessarily correct in their predictions or consistent with either one another or with other theories about the physical world.<\/p>\n
Source: (1001) Alan Cooper’s answer to Why do people have different definitions of quantum? Is quantum mechanics a logically consistent, self-consistent theory? – Quora<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Quantum Mechanics is not a single theory. In the past there have been other attempts to describe the fundamental aspects of physics which used the word \u201cquantum\u201d in various different senses, but to most physicists nowadays it is a class of theories characterized by the property of having the \u201cpure states\u201d of an isolated system … Continue reading Why do people have different definitions of quantum? Is quantum mechanics a logically consistent, self-consistent theory?\u00a0<\/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":[4],"tags":[28],"topics":[],"class_list":["post-1239","post","type-post","status-publish","format-standard","hentry","category-quora-answers","tag-quantum"],"_links":{"self":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1239","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=1239"}],"version-history":[{"count":1,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1239\/revisions"}],"predecessor-version":[{"id":1240,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1239\/revisions\/1240"}],"wp:attachment":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/media?parent=1239"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/categories?post=1239"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/tags?post=1239"},{"taxonomy":"topics","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/topics?post=1239"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}