{"id":2547,"date":"2009-05-01T21:14:19","date_gmt":"2009-05-01T21:14:19","guid":{"rendered":"http:\/\/casgroups.case.edu\/physics-senior-projects\/?p=2547"},"modified":"2016-06-20T14:37:17","modified_gmt":"2016-06-20T14:37:17","slug":"phantom-interference-effects-in-quantum-tunneling","status":"publish","type":"post","link":"https:\/\/casgroups.case.edu\/physics-senior-projects\/phantom-interference-effects-in-quantum-tunneling\/","title":{"rendered":"Phantom Interference Effects in Quantum Tunneling"},"content":{"rendered":"<h3 style=\"text-align: center\" align=\"center\">Dustin Fisher with Harsh Mathur<\/h3>\n<h3 style=\"text-align: center\" align=\"center\"><a href=\"\/physics-senior-projects\/files\/2009\/05\/DustinFisherPoster.pdf\">Phantom Interference Effects in Quantum Tunneling<\/a><\/h3>\n<p align=\"left\">It has recently been observed [1, 2] that radioactive decay of certain isotopes [Praesodymium-140 (140Pr) and Promethium-142 (142Pm)] exhibit an oscillatory exponential time dependence in a marked departure from the simple exponential behavior that is normally observed. A recent theoretical study [3] of electrons tunneling off the surface of liquid helium predicted that electronic tunneling decay could show oscillatory exponential behavior due to quantum interference between the decaying electronic state and a nearby unoccupied &#8220;phantom&#8221; state. This mechanism is quite general and should also apply to other quantum systems including atomic nuclei. The purpose of this project is to adapt the theory of ref [3] to the problem of nuclear beta decay via K-capture and to determine whether it can account for the oscillations observed by ref [1].<\/p>\n[1] Litvinov, Yu. A. et al. Phys. Lett. B 644, 162-168 (2008)<br \/>[2] Walker, Philip M. Nature 453, 864-865 (12 June 2008)<br \/>[3] S. Duki and H. Mathur arXiv:0804.2210v1, (14 April 2008)<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Dustin Fisher with Harsh Mathur<a href=\"\/physics-senior-projects\/files\/2009\/05\/DustinFisherPoster.pdf\">Phantom Interference Effects in Quantum Tunneling<\/a><\/p>\n<p align=\"left\">It has recently been observed [1, 2] that radioactive decay of certain isotopes [Praesodymium-140 (140Pr) and Promethium-142 (142Pm)] exhibit an oscillatory exponential time dependence in a marked departure from the simple exponential behavior that is normally observed. A recent theoretical study [3] of electrons tunneling off the surface of liquid helium predicted that electronic tunneling decay could show oscillatory exponential behavior due to quantum interference between the decaying electronic state and a nearby unoccupied &#8220;phantom&#8221; state. This mechanism is quite general and should also apply to other quantum systems including atomic nuclei.<\/p>\n<p><a href=\"https:\/\/casgroups.case.edu\/physics-senior-projects\/phantom-interference-effects-in-quantum-tunneling\/\" class=\"more-link\">Continue reading&#8230; <span class=\"screen-reader-text\">Phantom Interference Effects in Quantum Tunneling<\/span><\/a><\/p>\n","protected":false},"author":19,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[81,41],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/posts\/2547"}],"collection":[{"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/comments?post=2547"}],"version-history":[{"count":3,"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/posts\/2547\/revisions"}],"predecessor-version":[{"id":2740,"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/posts\/2547\/revisions\/2740"}],"wp:attachment":[{"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/media?parent=2547"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/categories?post=2547"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/casgroups.case.edu\/physics-senior-projects\/wp-json\/wp\/v2\/tags?post=2547"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}