{"id":125951,"date":"2015-09-08T02:00:00","date_gmt":"2015-09-07T23:00:00","guid":{"rendered":"http:\/\/www.fyysika.ee\/?guid=d88717fe4b2143bfa712fe512e5fa62b"},"modified":"2015-09-08T02:00:00","modified_gmt":"2015-09-07T23:00:00","slug":"understanding-the-pointer-states-3","status":"publish","type":"post","link":"https:\/\/www.fyysika.ee\/?p=125951","title":{"rendered":"Understanding the pointer states"},"content":{"rendered":"<p>In quantum mechanics, pointer states are eigenstates of the observable of the measurement apparatus<br \/>\nthat represent the possible positions of the display pointer of the equipment. The origin of this<br \/>\nconcept lies in attempts to fill the blanks in Everett\u2019s relative-state interpretation, and to make<br \/>\nit a fully valid description of physical reality. To achieve this, it was necessary to consider not<br \/>\nonly the main system interacting with the measurement apparatus (like von Neumann and Everett did)<br \/>\nbut also the role of the environment in eliminating correlations between different possible<br \/>\nmeasurements when interacting with the measurement apparatus. The interaction of the environment<br \/>\nwith the main system (and the measurement apparatus) is the core of the decoherence theory, which<br \/>\nfollowed Everett\u2019s thesis. In this article, we review the measurement process according to von<br \/>\nNeumann, Everett\u2019s relative state interpretation, the purpose of decoherence and some of its<br \/>\nfollow-up until Wojcie&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In quantum mechanics, pointer states are eigenstates of the observable of the measurement apparatus<br \/>\nthat represent the possible positions of the display pointer of the equipment. The origin of this<br \/>\nconcept lies in attempts to fill the blanks in Evere&#8230;<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_genesis_hide_title":false,"_genesis_hide_breadcrumbs":false,"_genesis_hide_singular_image":false,"_genesis_hide_footer_widgets":false,"_genesis_custom_body_class":"","_genesis_custom_post_class":"","_genesis_layout":"","footnotes":""},"categories":[178],"tags":[],"class_list":{"0":"post-125951","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-rss-fuusikaharidus","7":"entry"},"_links":{"self":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/125951","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=125951"}],"version-history":[{"count":0,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=\/wp\/v2\/posts\/125951\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=125951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=125951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.fyysika.ee\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=125951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}