{"id":651,"date":"2021-07-06T16:17:09","date_gmt":"2021-07-06T16:17:09","guid":{"rendered":"https:\/\/sites.rutgers.edu\/maitra-group\/?p=651"},"modified":"2021-07-16T15:32:41","modified_gmt":"2021-07-16T15:32:41","slug":"exact-tddft-for-non-perturbative-dynamics-of-helium-atom","status":"publish","type":"post","link":"https:\/\/sites.rutgers.edu\/maitra-group\/exact-tddft-for-non-perturbative-dynamics-of-helium-atom\/","title":{"rendered":"Exact TDDFT for non-perturbative dynamics of helium atom"},"content":{"rendered":"<p>Congratulations to our PhD student <a href=\"https:\/\/sites.rutgers.edu\/maitra-group\/people\/davood-dar\/\">Davood Dar<\/a> for his opening presentation in the <a href=\"https:\/\/sites.rutgers.edu\/dft-student-seminar\/\" target=\"_blank\" rel=\"noopener\">(TD)DFT Student Seminar Series<\/a>!<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-large wp-image-564 alignnone\" src=\"http:\/\/sites.rutgers.edu\/maitra-group\/wp-content\/uploads\/sites\/354\/2021\/07\/davoodtalk-1024x508.png\" alt=\"\" width=\"1024\" height=\"508\" srcset=\"https:\/\/sites.rutgers.edu\/maitra-group\/wp-content\/uploads\/sites\/354\/2021\/07\/davoodtalk-1024x508.png 1024w, https:\/\/sites.rutgers.edu\/maitra-group\/wp-content\/uploads\/sites\/354\/2021\/07\/davoodtalk-300x149.png 300w, https:\/\/sites.rutgers.edu\/maitra-group\/wp-content\/uploads\/sites\/354\/2021\/07\/davoodtalk-768x381.png 768w, https:\/\/sites.rutgers.edu\/maitra-group\/wp-content\/uploads\/sites\/354\/2021\/07\/davoodtalk-1536x763.png 1536w, https:\/\/sites.rutgers.edu\/maitra-group\/wp-content\/uploads\/sites\/354\/2021\/07\/davoodtalk-2048x1017.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h5>Abstract<\/h5>\n<p>By inverting the time-dependent Kohn-Sham equation for a numerically exact dynamics of the helium atom, we show that the dynamical step and peak features of the exact correlation potential found previously in one-dimensional models persist for real three-dimensional systems. We demonstrate that the Kohn-Sham and true current-densities differ by a rotational component. The results have direct implications for approximate TDDFT calculations of atoms and molecules in strong fields, emphasizing the need to go beyond the adiabatic approximation, and highlighting caution in quantitative use of the Kohn-Sham current.<\/p>\n<p><a class=\"btn btn-primary\" href=\"https:\/\/www.youtube.com\/watch?v=vi1LuyEB8Co\" target=\"_blank\" rel=\"noopener\">Watch the talk<\/a><\/p>\n<p><a class=\"btn\" href=\"https:\/\/arxiv.org\/abs\/2105.08656\">Read the paper<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Congratulations to our PhD student Davood Dar for his opening presentation in the (TD)DFT Student Seminar Series! Abstract By inverting the time-dependent Kohn-Sham equation for a numerically exact dynamics of &hellip; <a href=\"https:\/\/sites.rutgers.edu\/maitra-group\/exact-tddft-for-non-perturbative-dynamics-of-helium-atom\/\" class=\"\">Read More<\/a><\/p>\n","protected":false},"author":1708,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-651","post","type-post","status-publish","format-standard","hentry","category-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Exact TDDFT for non-perturbative dynamics of helium atom - Maitra Group<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/sites.rutgers.edu\/maitra-group\/exact-tddft-for-non-perturbative-dynamics-of-helium-atom\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Exact TDDFT for non-perturbative dynamics of helium atom - Maitra Group\" \/>\n<meta property=\"og:description\" content=\"Congratulations to our PhD student Davood Dar for his opening presentation in the (TD)DFT Student Seminar Series! Abstract By inverting the time-dependent Kohn-Sham equation for a numerically exact dynamics of &hellip; Read More\" \/>\n<meta property=\"og:url\" content=\"https:\/\/sites.rutgers.edu\/maitra-group\/exact-tddft-for-non-perturbative-dynamics-of-helium-atom\/\" \/>\n<meta property=\"og:site_name\" content=\"Maitra Group\" \/>\n<meta property=\"article:published_time\" content=\"2021-07-06T16:17:09+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-07-16T15:32:41+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/sites.rutgers.edu\/maitra-group\/wp-content\/uploads\/sites\/354\/2021\/07\/davoodtalk-1024x508.png\" \/>\n<meta name=\"author\" content=\"Lionel R. Lacombe\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Lionel R. 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