{"id":16243,"date":"2023-08-09T14:31:52","date_gmt":"2023-08-09T21:31:52","guid":{"rendered":"https:\/\/dornsife.usc.edu\/news\/?p=16243"},"modified":"2024-10-03T17:10:44","modified_gmt":"2024-10-04T00:10:44","slug":"physicist-deeply-understood-the-beauty-of-his-subject","status":"publish","type":"post","link":"https:\/\/dornsife.usc.edu\/news\/stories\/physicist-deeply-understood-the-beauty-of-his-subject\/","title":{"rendered":"Physicist deeply understood the beauty of his subject"},"content":{"rendered":"\n\n\n    \n                                          \n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-hero \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-hero\"\n    \n      >\n\n    \n<div class=\"inner-wrapper\">\n          \n<div class=\"f--field f--image\">\n\n    \n    \n    \n    \n    \n    \n              \n      <img\n                            data-src=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_Top-768x432.jpg\"\n          data-srcset=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_Top-1920x1080.jpg 1920w,https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_Top-1280x720.jpg 1280w,https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_Top-768x432.jpg 768w\"          data-sizes=\"(min-width:1200px) 75vw, (min-width:768px) 83vw, 100vw\"          class=\"lazyload\"\n        \n                  alt=\"Dennis Nemeschansky wears a blue, collared shirt and stands outdoors in front of leafy background.\"\n        \n        \n                                      \/>\n\n    \n    \n  \n  \n\n<\/div>\n  \n      <div class=\"image-caption\">\n          \n<div class=\"f--field f--description\">\n\n    \n  USC Dornsife physics professor Dennis Nemeschansky changed prevailing thought on quantum field theory. (Photo: Peter Zhaoyu Zhou.)\n\n\n<\/div>\n    <\/div>\n  \n  <div class=\"text-wrapper\">\n          <nav aria-label=\"Breadcrumb\" class=\"breadcrumbs\">\n        <ul>\n                      <li><a href=\"\/news\/stories\/\">News<\/a><\/li>\n                      <li><a href=\"\/news\/stories\/\/?category=faculty\">Faculty<\/a><\/li>\n                  <\/ul>\n      <\/nav>\n    \n              \n<div class=\"f--field f--page-title\">\n\n    \n  <h1>Physicist deeply understood the beauty of his subject<\/h1>\n\n\n<\/div>\n    \n          <div class=\"subtitle\">\n            \n<div class=\"f--field f--description\">\n\n    \n  An expert on string theory who broke the mold of quantum field theory, USC Dornsife physicist Dennis Nemeschansky was devoted to helping students share his appreciation for the beauty and elegance of his field.\n\n\n<\/div>\n      <\/div>\n    \n           <strong class=\"author-field\"><span >By<\/span><a href=\"mailto:communication@dornsife.usc.edu\">Susan Bell<\/a><\/strong>\n    \n          <span class=\"post-date-field\">August 9, 2023<\/span>\n      <\/div>\n<\/div>\n\n\n  <\/div><\/div>\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--social-share \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--social-share\"\n    \n      >\n\n    \n  <div class=\"content-wrapper\">\n    <span class=\"a2a_kit a2a_kit_size_32 addtoany_list\" style=\"line-height: 32px;\">\n      <span class=\"title\">\n        Share\n      <\/span>\n                        <a class=\"a2a_button_copy_link\" target=\"_blank\" href=\"\/#copy_link\" rel=\"nofollow noopener\" title=\"Link\">\n            <span class=\"a2a_svg a2a_s__default a2a_s_copy_link\">\n              <svg height=\"19\" viewBox=\"0 0 19 19\" width=\"19\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m7.43475275 9.52380952-2.17490843 2.26076008c-1.08745421 1.058837-1.68841575 2.518315-1.68841575 4.0350275 0 1.5167124.60096154 2.9475732 1.68841575 4.0350274 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xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"m8.14285714 9.42857143c-.17142857 0-.34285714 0-.51428571.08571428l7.28571427 6.34285719c.3428572.2571428.6857143.2571428.9428572 0l7.2857142-6.34285719c-.0857142-.08571428-.2571428-.08571428-.4285714-.08571428zm-1.28571428 1.11428567v.1714286 8.5714286c0 .6857143.6 1.2857143 1.28571428 1.2857143h14.57142856c.6857143 0 1.2857143-.6 1.2857143-1.2857143v-8.5714286c0-.0857143 0-.0857143 0-.1714286l-7.2 6.3428572c-.7714286.6857143-1.8857143.6857143-2.6571429 0z\" fill-rule=\"evenodd\" transform=\"translate(-6 -9)\"\/><\/svg>\n            <\/span>\n            <span class=\"a2a_label visually-hidden\">Email<\/span>\n          <\/a>\n                  <\/span>\n  <\/div>\n\n  <\/div><\/div>\n \n\n\n\n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--rich-text \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--rich-text\"\n    \n      >\n\n    \n      \n<div class=\"f--field f--wysiwyg\">\n\n    \n  <p>Dennis Nemeschansky, professor of <a href=\"https:\/\/dornsife.usc.edu\/physics\/\">physics and astronomy<\/a> at USC Dornsife College of Letters, Arts and Sciences, died on June\u00a01. He was 67.<\/p>\n<p>An expert on string theory who focused on supersymmetry quantum field theory, Nemeschansky is best known for the Minahan-Nemeschansky Theory, which he developed with visiting physicist Joseph Minahan during a game of golf.<\/p>\n<p>Published in 1997, their <a href=\"https:\/\/www.researchgate.net\/publication\/222473123_Superconformal_fixed_points_with_En_global_symmetry\">paper<\/a> showed that the then-current approach to constructing certain types of important supersymmetric quantum field theories was incorrect and demonstrated the correct way to do it. Initial skepticism from the scientific community gradually gave way to respect and acceptance a decade later, as the theory continued to hold true under scrutiny.<\/p>\n<figure id=\"attachment_16253\" aria-describedby=\"caption-attachment-16253\" style=\"width: 411px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-16253\" src=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryA-411x550.jpg\" alt=\"An ink illustration depicts Dennis Nemeschansky sitting on a skateboard while holding a fire extinguisher and surrouned by thought bubbles containing math formulae. \" width=\"411\" height=\"550\" srcset=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryA-411x550.jpg 411w, https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryA-764x1024.jpg 764w, https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryA-768x1029.jpg 768w, https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryA.jpg 980w\" sizes=\"(max-width: 411px) 100vw, 411px\" \/><figcaption id=\"caption-attachment-16253\" class=\"wp-caption-text\">This caricature of Dennis Nemeschansky demonstrating Newton\u2019s Third Law using a skateboard and a fire extinguisher was drawn by his former student Kayan Sarpelleh in 2016. (Image: Courtesy of David Nemeschansky.)<\/figcaption><\/figure>\n<p>Moreover, they were able to generalize their result to construct several more theories that completed a connection between these supersymmetric quantum field theories and a deep mathematical classification result.<\/p>\n<p>Nemeschansky\u2019s teaching focused on pre-med physics, and he taught \u201cPhysics for the Life Sciences\u201d (PHYS 135) for more than 30 years.<\/p>\n<p>Stephan Haas, chair of the Department of Physics and professor of physics and astronomy, said Nemeschansky would be sorely missed by faculty and students alike.<\/p>\n<p>\u201cDennis had a great sense of humor, passion for science and ability to communicate complex material in a very understandable way,\u201d Haas said.<\/p>\n<p>Indeed, Nemeschansky wasn\u2019t shy about using his considerable athleticism to illustrate the properties of physics to his students and could be spotted each semester demonstrating Newton\u2019s Third Law by whizzing across campus on a skateboard with a fire extinguisher attached.<\/p>\n<p>\u201cStudents and colleagues loved his casual and relatable attitude,\u201d Haas said. \u201cIn his research, he made seminal contributions to our understanding of quantum field theory and string theory, their application to unification of forces, and on strong-weak coupling duality in supersymmetric quantum chromodynamics.\u201d<\/p>\n<p><strong>A true calling<\/strong><\/p>\n<p>Nemeschansky was born in Helsinki, Finland, on Dec. 21, 1955. His father, Arje, was a salesman of kitchen equipment and his mother, Joan, worked in pharmaceutical sales. Nemeschansky was brought up in the Jewish faith, attending Hebrew school in Helsinki.<\/p>\n<p>His son, alumnus David Nemeschansky \u201915, who earned undergraduate degrees in political science from USC Dornsife and in communication from USC Annenberg School for Communication and Journalism as well as a progressive masters from USC Leventhal School of Accounting, said his father was one of the lucky few blessed with a true calling in life.<\/p>\n<p>\u201cHe always knew from a very young age that math and physics were his thing,\u201d he said. \u201cIt actually made his parents very nervous because he just wanted to do numbers and really had no patience or interest in any other subject.\u201d<\/p>\n<p>After completing his national service in the Finnish Army, Nemeschansky obtained an MSc in theoretical physics from Helsinki University of Technology in 1980. He then moved to the United States to earn his PhD at Princeton University in 1984, where he collaborated with and was taught by some of the leading physics minds of the day. It was also where he decided to study string theory, which he specialized in throughout his career.<\/p>\n<p>After Princeton, he moved to Stanford University, where he completed his postdoctoral training at the Stanford Linear Accelerator Center in 1986.<\/p>\n<p>The move to California proved decisive.<\/p>\n<p>\u201cComing from Finland\u2019s cold, dark winters, he fell in love with the sunny paradise of California and really wanted to stay here,\u201d said David Nemeschansky.<\/p>\n<p>The promising young physicist was invited to give a talk at USC\u2019s inaugural string theory conference in 1985 and joined USC Dornsife the following year.<\/p>\n<blockquote><p>He had this personality where he wanted things done right \u2014 98% wasn\u2019t good enough.<\/p><\/blockquote>\n<p>He was recruited with <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/mechanics-of-string-theory\/\">Itzhak Bars<\/a>, professor of physics and astronomy, to create a new theoretical physics group within the department.<\/p>\n<p>\u201cMost of these new hires were string theorists. My father was really excited about that and the possibility of working with those folks and building out something new at USC,\u201d David Nemeschansky said.<\/p>\n<p>A devoted teacher and mentor to his students, Nemeschansky took office hours very seriously, offering more than was required of him.<\/p>\n<p>\u201cHe believed that you had to really understand physics and the mathematical backing behind it; you couldn\u2019t just memorize formulas,\u201d David Nemeschansky said. \u201cHe felt very strongly that people need to be taught in a way that shows them that beauty and elegance. And then they would never have to memorize a formula; they would see how it all ties together.\u201d<\/p>\n<p>While David Nemeschansky was a student at USC, he remembers his father inviting him to attend a lecture in which he would demonstrate how the entire physics textbook could be derived from two formulas. \u201cI remember watching people in the first 15 minutes meticulously taking notes as he\u2019s doing all these graphs on the chalkboard \u2014 he had no notes, it was all in his head. And then you could slowly see the atmosphere in the room turn to awe because it was very clear that his understanding was so deep.\u201d<\/p>\n<p>Disinterested in becoming department chair because he preferred to concentrate on his teaching and research, Nemeschansky did serve as colloquium chair, organizing physics symposiums and bringing in expert speakers to talk to faculty and doctoral students. He also served as scheduling chair, compiling the department\u2019s class schedules.<\/p>\n<p>In 1995 and 2004, he was a visiting fellow at the European Organization for Nuclear Research on the French-Swiss border, the location of the world\u2019s most powerful particle accelerator. He also spent the summer of 2018 at TRIUMF in Canada.<\/p>\n<p>Prior to his death, Nemeschansky wrote a physics textbook tailored to health students with USC Dornsife\u2019s Scott Macdonald, assistant professor (teaching) of physics and astronomy. MacDonald is currently in talks with a publisher.<\/p>\n<p><strong>A passion for family, physics, sports \u2014 and books<\/strong><\/p>\n<p>David Nemeschansky remembers being impressed by his father\u2019s extensive library.<\/p>\n<p>\u201cI used to joke that in his office he had a \u2018wizard library.\u2019 He really was trying to figure out the great mysteries of the universe, how matter is constructed, how the tiniest subatomic particles work. How many dimensions are there? How did the universe begin?\u201d<\/p>\n<p>In addition to his life-long passion for physics, Nemeschansky was a huge sports enthusiast.<\/p>\n<p>\u201cMy father was a man of a very clear priorities: family, physics and sports \u2014 in that order,\u201d said David Nemeschansky.<\/p>\n<p>He was a keen ice hockey player and was so talented at tennis that at university he had to choose between a professional career in the sport and physics. His love of physics won.<\/p>\n<p>Nemeschansky was also a talented soccer player and became an avid golfer in middle age.<\/p>\n<p>\u201cHe had this personality where he wanted things done right \u2014 98% wasn\u2019t good enough,\u201d David Nemeschansky said. \u201cHe had immensely high standards \u2014 for instance, he would rather not publish than publish something that was mediocre.\u201d That exacting nature translated into sports.<\/p>\n<p>\u201cHe really wanted me to have outstanding hockey training and he felt he was the only person who could do that, so he became my coach.\u201d<\/p>\n<p><strong>The modest Finn<\/strong><\/p>\n<p>Nemeschansky may have been a perfectionist, but by all accounts, he was also an extremely modest, private man who asked students to call him by his first name.<\/p>\n<figure id=\"attachment_16257\" aria-describedby=\"caption-attachment-16257\" style=\"width: 411px\" class=\"wp-caption alignleft\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-16257\" src=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryB-411x550.jpg\" alt=\"Dennis Nemeschansky, wearing a black and yellow rain coat and a black hat operates a camera on a tripod to take a photograph of a waterful under a bridge.\" width=\"411\" height=\"550\" srcset=\"https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryB-411x550.jpg 411w, https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryB-764x1024.jpg 764w, https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryB-768x1029.jpg 768w, https:\/\/dornsife.usc.edu\/news\/wp-content\/uploads\/sites\/7\/2023\/08\/Nemeschansky-Dennis_Obit_InStoryB.jpg 980w\" sizes=\"(max-width: 411px) 100vw, 411px\" \/><figcaption id=\"caption-attachment-16257\" class=\"wp-caption-text\">Dennis Nemeschansky\u2019s zeal for photographing waterfalls earned him the family nickname \u201cCaptain Tripod.\u201d (Photo: Courtesy of David Nemeschansky.)<\/figcaption><\/figure>\n<p>He is fondly remembered by faculty, staff and students as a brilliant but self-effacing man who inevitably had an undone shoelace.<\/p>\n<p>\u201cHe was a man of few words. He didn\u2019t really talk much about himself unless asked and even then, if you asked him where he went to school, he would say \u2018back East.\u2019 He wouldn\u2019t say \u2018Princeton,\u2019\u201d said David Nemeschansky.<\/p>\n<p>Nemeschansky spoke fluent Finnish, Swedish and English and some Hebrew.<\/p>\n<p>A believer in Judaism who saw ample room for God and physics to go hand in hand, Nemeschansky regularly attended synagogue.<\/p>\n<p>In 1988, he married Lauren Rosen, a grade schoolteacher who later became a successful realtor.<\/p>\n<p>Nemeschansky loved to travel and enjoyed photographing waterfalls so much his family nicknamed him \u201cCaptain Tripod.\u201d<\/p>\n<p>He retained great affection for the country of his birth throughout his life despite feeling it was a little small.<\/p>\n<p>\u201cHe had bigger dreams, and that eventually took him to the U.S.,\u201d said David Nemeschansky. \u201cHe married an American, had American children, but he stayed a Finnish citizen until he died. He loved his country.\u201d<\/p>\n<p>Nemeschansky is survived by his mother; his wife; his sons, David and Marc; and his brothers, Ben and Michael.<\/p>\n\n\n\n<\/div>\n\n\n  <\/div><\/div>\n\n\n\n  \n        \n  \n    \n\n\n\n\n\n\n<div\n  class=\"cc--component-container cc--article-related-stories \"\n\n  \n  \n  \n  \n  \n  \n  >\n  <div class=\"c--component c--article-related-stories\"\n    \n      >\n\n    \n  <div class=\"inner-wrapper\">\n              \n<div class=\"f--field f--section-title\">\n\n    \n  <h2>\n          Related Articles\n      <\/h2>\n\n\n<\/div>\n    \n                  <article>\n              \n<div class=\"f--field f--cta-title\">\n\n    \n  <h3>\n          <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/in-memoriam-norah-ashe-mcnalley-director-of-the-writing-program\/\" \n                        class=\"\" \n      >In Memoriam: Norah Ashe-McNalley, director of The Writing Program<\/a>\n      <\/h3>\n\n\n<\/div>\n        <\/article>\n              <article>\n              \n<div class=\"f--field f--cta-title\">\n\n    \n  <h3>\n          <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/in-memoriam-william-mcclure-scientist-developed-uscs-neurosciences-programs\/\" \n                        class=\"\" \n      >In Memoriam: William McClure, scientist who developed USC\u2019s neurosciences programs<\/a>\n      <\/h3>\n\n\n<\/div>\n        <\/article>\n              <article>\n              \n<div class=\"f--field f--cta-title\">\n\n    \n  <h3>\n          <a href=\"https:\/\/dornsife.usc.edu\/news\/stories\/gerd-bergmann-physicist-obituary\/\" \n                        class=\"\" \n      >Gerd Bergmann, physicist who probed the wavy motions of electrons<\/a>\n      <\/h3>\n\n\n<\/div>\n        <\/article>\n            <\/div>\n\n\n  <\/div><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Dennis Nemeschansky, a string theory expert who changed understanding of quantum field theory, helped students appreciate the beauty and elegance of his field.<\/p>\n","protected":false},"author":14,"featured_media":16263,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,16],"tags":[96,125,1906,216],"class_list":["post-16243","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-faculty","category-science-and-technology","tag-natural-sciences","tag-obituary","tag-phys","tag-physics-and-astronomy"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Physicist deeply understood the beauty of his subject<\/title>\n<meta name=\"description\" content=\"USC Dornsife physics professor and string theory expert who changed prevailing thought on quantum field theory has died at age 67.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, 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