{"id":4153,"date":"2009-10-11T07:52:55","date_gmt":"2009-10-11T07:52:55","guid":{"rendered":"http:\/\/scienceblogs.com\/principles\/2009\/10\/11\/links-for-2009-10-11\/"},"modified":"2009-10-11T07:52:55","modified_gmt":"2009-10-11T07:52:55","slug":"links-for-2009-10-11","status":"publish","type":"post","link":"http:\/\/chadorzel.com\/principles\/2009\/10\/11\/links-for-2009-10-11\/","title":{"rendered":"Links for 2009-10-11"},"content":{"rendered":"<ul class=\"delicious\">\n<li>\n<div class=\"delicious-link\"><a href=\"http:\/\/physics.aps.org\/articles\/v2\/83\">Physics &#8211; Protecting quantum superpositions from the outside world<\/a><\/div>\n<div class=\"delicious-extended\">&#8220;Quantum information science relies on superpositions of quantum states with a definite phase relation, but such superpositions are inherently fragile against interactions with their environment. Fortunately, if some kind of common property bounds these interactions, it is possible, though by no means easy in a practical setting, to come up with states that are essentially immune to their environment. In papers appearing in Physical Review A and Physical Review Letters, Magnus R\u00c3\u00a5dmark and Mohamed Bourennane at Stockholm University in Sweden and Marcin Wi\u00c5\u009bniak and Marek \u00c5\u00bbukowski at Uniwesytet Gda\u00c5\u0084ski in Poland report that they have prepared a six-photon entangled state that is immune to the environmental disturbances commonly occurring in optical fibers.&#8221;<\/div>\n<div class=\"delicious-tags\">(tags: <a href=\"http:\/\/delicious.com\/orzelc\/science\">science<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/physics\">physics<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/quantum\">quantum<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/optics\">optics<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/precision-measurement\">precision-measurement<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/experiment\">experiment<\/a>)<\/div>\n<\/li>\n<li>\n<div class=\"delicious-link\"><a href=\"http:\/\/scitation.aip.org\/getabs\/servlet\/GetabsServlet?prog=normal&amp;id=PRLTAO000103000015153601000001&amp;idtype=cvips&amp;gifs=Yes\">Phase Shift of a Weak Coherent Beam Induced by a Single Atom<\/a><\/div>\n<div class=\"delicious-extended\">&#8220;We report on a direct measurement of a phase shift on a weak coherent beam by a single 87Rb atom in a Mach-Zehnder interferometer. By strongly focusing the probe mode to the location of the atom, a maximum phase shift of about 1\u00c2\u00b0 is observed experimentally.&#8221;<\/div>\n<div class=\"delicious-tags\">(tags: <a href=\"http:\/\/delicious.com\/orzelc\/physics\">physics<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/quantum\">quantum<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/atoms\">atoms<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/optics\">optics<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/articles\">articles<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/experiment\">experiment<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/science\">science<\/a>)<\/div>\n<\/li>\n<li>\n<div class=\"delicious-link\"><a href=\"http:\/\/scitation.aip.org\/getabs\/servlet\/GetabsServlet?prog=normal&amp;id=PRLTAO000103000015152301000001&amp;idtype=cvips&amp;gifs=Yes\">Yoctosecond Photon Pulses from Quark-Gluon Plasmas<\/a><\/div>\n<div class=\"delicious-extended\">&#8220;Present ultrafast laser optics is at the frontier between atto- and zeptosecond photon pulses, giving rise to unprecedented applications. We show that high-energetic photon pulses down to the yoctosecond time scale can be produced in heavy-ion collisions. We focus on photons produced during the initial phase of the expanding quark-gluon plasma. We study how the time evolution and properties of the plasma may influence the duration and shape of the photon pulse. Prospects for achieving double-peak structures suitable for pump-probe experiments at the yoctosecond time scale are discussed.&#8221;<\/div>\n<div class=\"delicious-tags\">(tags: <a href=\"http:\/\/delicious.com\/orzelc\/physics\">physics<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/optics\">optics<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/atoms\">atoms<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/particles\">particles<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/articles\">articles<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/science\">science<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/theory\">theory<\/a>)<\/div>\n<\/li>\n<li>\n<div class=\"delicious-link\"><a href=\"http:\/\/www.youtube.com\/watch?v=FIXRXMMlZBM\">YouTube &#8211; Song A Day #264: Quantum Decoupling Transition in a One-Dimensional Feshbach-Resonant Superfluid<\/a><\/div>\n<div class=\"delicious-extended\">It&#8217;s got a beat, and I suppose one could dance to it.<\/div>\n<div class=\"delicious-tags\">(tags: <a href=\"http:\/\/delicious.com\/orzelc\/music\">music<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/silly\">silly<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/physics\">physics<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/condensed-matter\">condensed-matter<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/youtube\">youtube<\/a> <a href=\"http:\/\/delicious.com\/orzelc\/video\">video<\/a>)<\/div>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Physics &#8211; Protecting quantum superpositions from the outside world &#8220;Quantum information science relies on superpositions of quantum states with a definite phase relation, but such superpositions are inherently fragile against interactions with their environment. Fortunately, if some kind of common property bounds these interactions, it is possible, though by no means easy in a practical&hellip; <a class=\"more-link\" href=\"http:\/\/chadorzel.com\/principles\/2009\/10\/11\/links-for-2009-10-11\/\">Continue reading <span class=\"screen-reader-text\">Links for 2009-10-11<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"1","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21],"tags":[],"class_list":["post-4153","post","type-post","status-publish","format-standard","hentry","category-links_dump","entry"],"_links":{"self":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/posts\/4153","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/comments?post=4153"}],"version-history":[{"count":0,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/posts\/4153\/revisions"}],"wp:attachment":[{"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/media?parent=4153"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/categories?post=4153"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/chadorzel.com\/principles\/wp-json\/wp\/v2\/tags?post=4153"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}