{"id":12243,"date":"2017-05-09T06:07:52","date_gmt":"2017-05-09T06:07:52","guid":{"rendered":"http:\/\/revoscience.com\/en\/?p=12243"},"modified":"2017-05-09T06:07:52","modified_gmt":"2017-05-09T06:07:52","slug":"unpolarized-single-photon-generation-true-randomness-diamond","status":"publish","type":"post","link":"https:\/\/www.revoscience.com\/en\/unpolarized-single-photon-generation-true-randomness-diamond\/","title":{"rendered":"Unpolarized single-photon generation with true randomness from diamond"},"content":{"rendered":"<p style=\"text-align: justify;\"><span style=\"color: #000000;\"><em><strong>The Tohoku University research group of Professor Keiichi Edamatsu and Postdoctoral fellow Naofumi Abe has demonstrated dynamically and statically unpolarized single-photon generation using diamond.<\/strong><\/em><\/span><\/p>\n<figure id=\"attachment_12244\" aria-describedby=\"caption-attachment-12244\" style=\"width: 629px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-12244\" src=\"http:\/\/revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg\" alt=\"\" width=\"629\" height=\"456\" title=\"\"><figcaption id=\"caption-attachment-12244\" class=\"wp-caption-text\">Schematic picture of unpolarized single-photon generation using a compound defect, a nitrogen vacancy center (NV center), in a diamond. Spheres, designated N and V respectively, indicate a nitrogen atom and a vacancy which comprises an NV center in the diamond lattice. Dynamically and statically unpolarized single-photon emission is induced by laser excitation for a [111]-oriented NV center in (111) diamond.<\/figcaption><\/figure>\n<p style=\"text-align: justify;\"><span style=\"color: #000000;\">This result is expected to play a crucial role in hardware random number generation using single photons (quantum dice or quantum coin toss), quantum cryptography and the testing of fundamental problems in quantum mechanics.<\/span><\/p>\n<p><span style=\"color: #000000;\">Quantum information technology, such as quantum computing and quantum cryptography, has the potential to exceed classical information technology in security and capability. In quantum information technology, single photons play an especially important role.<\/span><\/p>\n<p><span style=\"color: #000000;\">A unit of quantum information is a quantum bit or qubit. It is a two-state quantum-mechanical system, such as the polarization of a single photon. Conventional research had been focused on the generation of single photons in pure polarization states. But now, the team from Tohoku University has, for the first time, generated single photons in random polarization states.<\/span><\/p>\n<p><span style=\"color: #000000;\">In their paper, published in Scientic Reports, the authors present the first demonstration that single-photon emission from a specially oriented compound defect (a nitrogen vacancy center) in diamond is dynamically and statically unpolarized with intrinsic randomness.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The Tohoku University research group of Professor Keiichi Edamatsu and Postdoctoral fellow Naofumi Abe has demonstrated dynamically and statically unpolarized single-photon generation using diamond. This result is expected to play a crucial role in hardware random number generation using single photons (quantum dice or quantum coin toss), quantum cryptography and the testing of fundamental problems [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":12244,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,17],"tags":[],"class_list":["post-12243","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-other","category-research"],"featured_image_urls":{"full":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537-150x150.jpg",150,150,true],"medium":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537-300x215.jpg",300,215,true],"medium_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"1536x1536":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"2048x2048":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"ultp_layout_landscape_large":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"ultp_layout_landscape":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"ultp_layout_portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"ultp_layout_square":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"newspaper-x-single-post":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"newspaper-x-recent-post-big":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"newspaper-x-recent-post-list-image":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",91,65,false],"web-stories-poster-portrait":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",500,359,false],"web-stories-publisher-logo":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",96,69,false],"web-stories-thumbnail":["https:\/\/www.revoscience.com\/en\/wp-content\/uploads\/2017\/05\/4537.jpg",150,108,false]},"author_info":{"info":["Amrita Tuladhar"]},"category_info":"<a href=\"https:\/\/www.revoscience.com\/en\/category\/news\/other\/\" rel=\"category tag\">Other<\/a> <a href=\"https:\/\/www.revoscience.com\/en\/category\/news\/research\/\" rel=\"category tag\">Research<\/a>","tag_info":"Research","comment_count":"0","_links":{"self":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/12243","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/comments?post=12243"}],"version-history":[{"count":0,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/posts\/12243\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media\/12244"}],"wp:attachment":[{"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/media?parent=12243"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/categories?post=12243"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.revoscience.com\/en\/wp-json\/wp\/v2\/tags?post=12243"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}