{"id":48180,"date":"2021-11-08T17:39:01","date_gmt":"2021-11-08T15:39:01","guid":{"rendered":"https:\/\/www.iemn.fr\/?p=48180"},"modified":"2021-11-22T12:47:09","modified_gmt":"2021-11-22T10:47:09","slug":"seminaire-de-martin-cordier-en-postdoc-a-berlin-sur-les-sources-de-photons-uniques-ou-de-paires-de-photons","status":"publish","type":"post","link":"https:\/\/www.iemn.fr\/en\/actualites\/seminaire-de-martin-cordier-en-postdoc-a-berlin-sur-les-sources-de-photons-uniques-ou-de-paires-de-photons.html","title":{"rendered":"S\u00e9minaire de Martin Cordier (postdoctorant \u00e0 Berlin) sur les sources de photons uniques ou de paires de photons"},"content":{"rendered":"<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-n9jhuc-b9dbd702d2e476f46bf3b568448ef056\">\n.flex_column.av-n9jhuc-b9dbd702d2e476f46bf3b568448ef056{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div  class='flex_column av-n9jhuc-b9dbd702d2e476f46bf3b568448ef056 av_one_full  avia-builder-el-0  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding'     ><section  class='av_textblock_section av-kvqtwvlb-9c628e71e648bd198d9fef98ec2baf8e'   itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\" ><div class='avia_textblock'  itemprop=\"text\" ><h4 style=\"text-align: center;\">S\u00e9minaire de Martin Cordier sur les sources de photons uniques ou de paires de photons<\/h4>\n<p>Martin, ancien stagiaire \u00e0 l\u2019IEMN, est <strong>post-doctorant \u00e0 l\u2019Universit\u00e9 de Berlin<\/strong> dans le groupe <em>Fondamentals of Optics and Photonics<\/em>.<\/p>\n<blockquote>\n<p>Le mercredi 10 novembre \u00e0 10h30<br \/>\nAmphitheater of the IEMN - Central Laboratory - Villeneuve d'Ascq<\/p>\n<\/blockquote>\n<h6 style=\"text-align: center;\">Single photon turnstile<\/h6>\n<div id=\"attachment_48183\" style=\"width: 191px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/11\/fecjcdfijgilcgaj.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-48183\" class=\"wp-image-48183\" src=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/11\/fecjcdfijgilcgaj-300x261.jpg\" alt=\"\" width=\"181\" height=\"158\" srcset=\"https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/11\/fecjcdfijgilcgaj-300x261.jpg 300w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/11\/fecjcdfijgilcgaj-14x12.jpg 14w, https:\/\/www.iemn.fr\/wp-content\/uploads\/2021\/11\/fecjcdfijgilcgaj.jpg 500w\" sizes=\"auto, (max-width: 181px) 100vw, 181px\" \/><\/a><p id=\"caption-attachment-48183\" class=\"wp-caption-text\">Illustration of the photon turnstile effect. After interacting with the atoms, the input laser light (Poissonian distribution) is transformed into a stream of single photons.<\/p><\/div>\n<p>Nonclassical states of light (single photons, entangled photon-pair, squeezing) are considered as one of the building block for the development of quantum technologies. The generation of quantum state of light typically requires a highly nonlinear medium that is strongly coupled to an optical mode. Recently, significant advances have been made in this direction by strongly coupling photons to quantum emitters (e.g. quantum dots, NV centers) and exploiting the inherently nonlinear response of the latter. Here, based on a recent proposal [1], we experimentally demonstrate a novel mechanism for generating stream of single photons and entangled single-photon pairs [2,3]. Our setup consists of an ensemble of cold atoms evanescently coupled to a nanofiber with near-resonant light. Using a quantum interference effect between the entangled-photon pairs emitted by the atomic ensemble and the transmitted laser light, we are able to modify the photon-statistics of the light from Poisonnian distribution to bunching (photon-pair source) and antibunching (single photon source). This new scheme may turn out transformational in quantum information science and offers fundamentally new approaches for realizing single photon sources that outperform sources based on single quantum emitters and can be implemented for any wavelength regime from microwave to X-ray.<\/p>\n<p>References:<br \/>\n[1] A. Prasad et al., Nature Photonics 1 (2020).<br \/>\n[2] S. Mahmoodian et al., Phys. Rev. X 10, 031011 (2020).<br \/>\n[3] M.Cordier et al. in preparation.<\/p>\n<h6>Contact Us<\/h6>\n<div  class='avia-button-wrap av-rpqvoq-bfc8c169cab0dff97ebc9a9c3981f86b-wrap avia-button-left  avia-builder-el-2  avia-builder-el-no-sibling'><a href='mailto:isabelle.lefebvre@isen.fr'  class='avia-button av-rpqvoq-bfc8c169cab0dff97ebc9a9c3981f86b av-link-btn avia-icon_select-yes-left-icon avia-size-small avia-position-left avia-color-silver'   aria-label=\"isabelle.lefebvre@isen.fr\"><span class='avia_button_icon avia_button_icon_left' aria-hidden='true' data-av_icon='\ue805' data-av_iconfont='entypo-fontello'><\/span><span class='avia_iconbox_title' >isabelle.lefebvre@isen.fr<\/span><\/a><\/div>\n<\/div><\/section><\/div>","protected":false},"excerpt":{"rendered":"","protected":false},"author":2,"featured_media":48186,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,40],"tags":[],"class_list":["post-48180","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-actualites","category-articles-temporaires-anglais"],"_links":{"self":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/48180","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/comments?post=48180"}],"version-history":[{"count":0,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/posts\/48180\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media\/48186"}],"wp:attachment":[{"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/media?parent=48180"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/categories?post=48180"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.iemn.fr\/en\/wp-json\/wp\/v2\/tags?post=48180"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}