{"id":8336,"date":"2012-11-20T21:16:51","date_gmt":"2012-11-21T03:16:51","guid":{"rendered":"http:\/\/bucktownbell.com\/?p=8336"},"modified":"2012-11-20T22:04:30","modified_gmt":"2012-11-21T04:04:30","slug":"quantum-cryptography-conquers-noise-problem-nature-news-comment","status":"publish","type":"post","link":"http:\/\/bucktownbell.com\/?p=8336","title":{"rendered":"Quantum cryptography conquers noise problem"},"content":{"rendered":"<blockquote><p>Physicists have attempted to solve the problem by <strong>sending photons through a shared fibre along a &#8216;quantum channel&#8217; at one characteristic wavelength<\/strong>. The trouble is that the fibre scatters light from the normal data traffic into that wavelength, polluting the quantum channel with stray photons. Andrew Shields, a physicist at the Toshiba Cambridge Research Laboratory, UK, and his colleagues have now developed a detector that <strong>picks out photons from this channel only if they strike it at a precise instant<\/strong>, calculated on the basis of when the encoded photons were sent. The team publishes its results in Physics Review X.<\/p><\/blockquote>\n<p>via <a href=\"http:\/\/www.nature.com\/news\/quantum-cryptography-conquers-noise-problem-1.11849\">Quantum cryptography conquers noise problem : Nature News &amp; Comment<\/a>.<\/p>\n<blockquote><p>Still, 90 kilometres is a \u201cworld record that is a big step forward in demonstrating the applicability of quantum cryptography in real-world telecommunications infrastructures\u201d, says Vicente Mart\u00edn, a physicist at the Technical University of Madrid.<\/p><\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Physicists have attempted to solve the problem by sending photons through a shared fibre along a &#8216;quantum channel&#8217; at one characteristic wavelength. The trouble is that the fibre scatters light from the normal data traffic into that wavelength, polluting the &hellip; <a href=\"http:\/\/bucktownbell.com\/?p=8336\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[110],"tags":[338,196,881,506],"class_list":["post-8336","post","type-post","status-publish","format-standard","hentry","category-networking","tag-encryption","tag-optical-networks","tag-physical-layer","tag-quantum-computing"],"_links":{"self":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/8336","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8336"}],"version-history":[{"count":2,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/8336\/revisions"}],"predecessor-version":[{"id":8340,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=\/wp\/v2\/posts\/8336\/revisions\/8340"}],"wp:attachment":[{"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8336"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/bucktownbell.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}