{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T11:51:33Z","timestamp":1782906693625,"version":"3.54.5"},"reference-count":104,"publisher":"AIP Publishing","issue":"1","funder":[{"DOI":"10.13039\/100000181","name":"Air Force Office of Scientific Research","doi-asserted-by":"publisher","award":["FA9550-21-1-0344"],"award-info":[{"award-number":["FA9550-21-1-0344"]}],"id":[{"id":"10.13039\/100000181","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000181","name":"Air Force Office of Scientific Research","doi-asserted-by":"publisher","award":["FA9550-23-1-0311"],"award-info":[{"award-number":["FA9550-23-1-0311"]}],"id":[{"id":"10.13039\/100000181","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["CHE-2522792"],"award-info":[{"award-number":["CHE-2522792"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["CHE-2515209"],"award-info":[{"award-number":["CHE-2515209"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100000001","name":"National Science Foundation","doi-asserted-by":"publisher","award":["OAC-2103717"],"award-info":[{"award-number":["OAC-2103717"]}],"id":[{"id":"10.13039\/100000001","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["pubs.aip.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2026,7,7]]},"abstract":"<jats:p>Strong-field ionization exhibits rich ultrafast dynamics arising from intricate electron-field interactions. However, the role of spin\u2013orbit coupling in the strong-field ionization of many-electron systems remains largely unexplored. Here, we develop a fully relativistic framework that combines a complex absorbing potential (CAP) with the exact two-component (X2C) real-time time-dependent density functional theory. We apply this approach to investigate the real-time strong-field dynamics of atomic krypton with a variational treatment of spin\u2013orbit coupling. The CAP-X2C method captures the spin\u2013orbit-resolved ionization-rate trends of the Kr 4p shell. Moreover, we uncover a previously inaccessible coherent population transfer channel between the 4p12 and 4p32 states, opened by spin\u2013orbit coupling, which lifts the nonrelativistic symmetry restriction that forbids their mixing. This work provides a practical framework for exploring strong-field dynamics in systems where spin\u2013orbit coupling plays a significant role.<\/jats:p>","DOI":"10.1063\/5.0320154","type":"journal-article","created":{"date-parts":[[2026,7,1]],"date-time":"2026-07-01T11:24:05Z","timestamp":1782905045000},"update-policy":"https:\/\/doi.org\/10.1063\/aip-crossmark-policy-page","source":"Crossref","is-referenced-by-count":0,"title":["Spin\u2013orbit-resolved strong-field ionization from real-time relativistic dynamics"],"prefix":"10.1063","volume":"165","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1365-820X","authenticated-orcid":false,"given":"Mengqi","family":"Yang","sequence":"first","affiliation":[{"name":"Department of Chemistry, University of Washington , Seattle, Washington 98195,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8501-0501","authenticated-orcid":false,"given":"Shiv","family":"Upadhyay","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Washington , Seattle, Washington 98195,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2287-2216","authenticated-orcid":false,"given":"Aodong","family":"Liu","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Washington , Seattle, Washington 98195,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7341-6240","authenticated-orcid":false,"given":"Xiaosong","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Chemistry, University of Washington , Seattle, Washington 98195,","place":["USA"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"317","published-online":{"date-parts":[[2026,7,1]]},"reference":[{"key":"2026070107084148300_c1","doi-asserted-by":"publisher","first-page":"1994","DOI":"10.1103\/physrevlett.71.1994","article-title":"Plasma perspective on strong field multiphoton ionization","volume":"71","year":"1993","journal-title":"Phys. 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