{"id":4085,"date":"2025-06-12T12:25:04","date_gmt":"2025-06-12T11:25:04","guid":{"rendered":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/?p=4085"},"modified":"2025-07-04T12:53:55","modified_gmt":"2025-07-04T11:53:55","slug":"ultrasensitive-single-ion-electrometry-in-a-magnetic-field-gradient-2","status":"publish","type":"post","link":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/ultrasensitive-single-ion-electrometry-in-a-magnetic-field-gradient-2\/","title":{"rendered":"Ultrasensitive Single-ion Electrometry in a Magnetic Field Gradient"},"content":{"rendered":"<div class=\"fusion-fullwidth fullwidth-box fusion-builder-row-1 nonhundred-percent-fullwidth non-hundred-percent-height-scrolling\"  style='background-color: rgba(255,255,255,0);background-position: center center;background-repeat: no-repeat;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;'><div class=\"fusion-builder-row fusion-row \"><div  class=\"fusion-layout-column fusion_builder_column fusion_builder_column_1_1 fusion-builder-column-1 fusion-one-full fusion-column-first fusion-column-last 1_1\"  style='margin-top:0px;margin-bottom:0px;'>\n\t\t\t\t\t<div class=\"fusion-column-wrapper\" style=\"padding: 0px 0px 0px 0px;background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;\"   data-bg-url=\"\">\n\t\t\t\t\t\t<div class=\"fusion-text\"><p>We amplify the coupling between electric field perturbations and the spin states by using a static magnetic field gradient. Displacements of the trapped ion resulting from the forces experienced by an applied external electric field perturbation are thereby mapped to an instantaneous change in the energy level splitting of the internal spin states. We demonstrate unprecedented electric field sensitivities for the measurement of both DC signals and AC signals across a frequency range of sub-Hz to \u223c 500 kHz. Finally, we describe a set of hardware modifications that are capable of achieving a further improvement in sensitivity by up to six orders of magnitude.<\/p>\n<p>The paper was published on 11 June 2025 in Nature Physics. <a href=\"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/Bonus-2025.pdf\"><br \/>Manuscript: Ultrasensitive Single-ion Electrometry in a Magnetic Field Gradient.<\/a><\/p>\n<p><a href=\"https:\/\/www.sussex.ac.uk\/news\/article\/68330-sussex-world-record-discovery-detecting-electric-fields-has-exciting-potential-for-real-world-applications\">University of Sussex Press release<\/a><\/p>\n<\/div><span class=\"fusion-imageframe imageframe-none imageframe-1 hover-type-none\"><img loading=\"lazy\" src=\"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Radio-4-Today-Show-icon.png\" width=\"878\" height=\"480\" alt=\"\" title=\"BBC Radio 4 Today Show icon\" class=\"img-responsive wp-image-4094\" srcset=\"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Radio-4-Today-Show-icon-200x109.png 200w, https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Radio-4-Today-Show-icon-400x219.png 400w, https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Radio-4-Today-Show-icon-600x328.png 600w, https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Radio-4-Today-Show-icon-800x437.png 800w, https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Radio-4-Today-Show-icon.png 878w\" sizes=\"(max-width: 991px) 100vw, 878px\" \/><\/span><div class=\"fusion-audio fusion-audio-1\" style=\"--fusion-audio-accent-color:#ffffff;--fusion-audio-border-size:0;--fusion-audio-border-top-left-radius:0px;--fusion-audio-border-top-right-radius:0px;--fusion-audio-border-bottom-right-radius:0px;--fusion-audio-border-bottom-left-radius:0px;--fusion-audio-background-color:#222222;--fusion-audio-max-width:100%;\"><!--[if lt IE 9]><script>document.createElement('audio');<\/script><![endif]-->\n<audio class=\"wp-audio-shortcode\" id=\"audio-4085-1\" loop=\"1\" preload=\"none\" style=\"width: 100%;\" controls=\"controls\"><source type=\"audio\/mpeg\" src=\"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Today-programme-WH06112025.m4a?_=1\" \/><a href=\"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Today-programme-WH06112025.m4a\">https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/BBC-Today-programme-WH06112025.m4a<\/a><\/audio><\/div><style type=\"text\/css\">@media all and (-ms-high-contrast: none), (-ms-high-contrast: active) {.fusion-audio-1{max-width:100%;}.fusion-audio-1 .mejs-embed,.fusion-audio-1 .mejs-embed body,.fusion-audio-1 .mejs-container .mejs-controls{background-color:#222222;}.fusion-audio-1 .mejs-controls .mejs-time-rail .mejs-time-current{background:#ffffff;}}<\/style><div class=\"fusion-clearfix\"><\/div>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><div  class=\"fusion-layout-column fusion_builder_column fusion_builder_column_1_1 fusion-builder-column-2 fusion-one-full fusion-column-first fusion-column-last 1_1\"  style='margin-top:0px;margin-bottom:0px;'>\n\t\t\t\t\t<div class=\"fusion-column-wrapper\" style=\"padding: 0px 0px 0px 0px;background-position:left top;background-repeat:no-repeat;-webkit-background-size:cover;-moz-background-size:cover;-o-background-size:cover;background-size:cover;\"   data-bg-url=\"\">\n\t\t\t\t\t\t<div class=\"fusion-clearfix\"><\/div>\n\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><\/div><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":3,"featured_media":4080,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[26],"tags":[],"jetpack_featured_media_url":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-content\/uploads\/2025\/06\/Cover-image.jpg","_links":{"self":[{"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/posts\/4085"}],"collection":[{"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/comments?post=4085"}],"version-history":[{"count":14,"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/posts\/4085\/revisions"}],"predecessor-version":[{"id":4110,"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/posts\/4085\/revisions\/4110"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/media\/4080"}],"wp:attachment":[{"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/media?parent=4085"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/categories?post=4085"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sussex.ac.uk\/physics\/iqt\/wp-json\/wp\/v2\/tags?post=4085"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}