[{"department":[{"_id":"MiLe"}],"ddc":["530"],"file":[{"checksum":"7c886e062b11058f00c2049ba47fe3df","date_created":"2026-10-07T06:55:14Z","success":1,"creator":"dernst","file_name":"2026_PhysicalReviewResearch_BeckerA.pdf","relation":"main_file","file_size":2520954,"access_level":"open_access","date_updated":"2026-10-07T06:55:14Z","content_type":"application/pdf","file_id":"23067"}],"date_created":"2026-09-27T22:01:52Z","date_published":"2026-09-22T00:00:00Z","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","article_processing_charge":"Yes","oa_version":"Published Version","title":"Core-hole excitation dynamics of one-dimensional ultracold trapped fermions","acknowledgement":"This work has been funded by the Cluster of Excellence “Advanced Imaging of Matter” of the Deutsche Forschungsgemeinschaft (DFG)—EXC 2056—Project No. 390715994. G.M.K. has received funding by the Austrian Science Fund (FWF) [Grant DOI: 10.55776/F1004]. For this work, the HPC-cluster Hummel-2 at University of Hamburg was used. The cluster was funded by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—498394658.","external_id":{"arxiv":["2604.23785"]},"status":"public","quality_controlled":"1","year":"2026","project":[{"name":"Coherent Optical Metrology Beyond Electric-Dipole-Allowed Transitions","grant_number":"F100403","_id":"7c040762-9f16-11ee-852c-dd79eeee4ab3"}],"_id":"23002","publication_identifier":{"eissn":["2643-1564"]},"language":[{"iso":"eng"}],"has_accepted_license":"1","month":"09","OA_type":"gold","author":[{"last_name":"Becker","first_name":"A.","full_name":"Becker, A."},{"full_name":"Koutentakis, Georgios","id":"d7b23d3a-9e21-11ec-b482-f76739596b95","first_name":"Georgios","last_name":"Koutentakis"},{"full_name":"Schmelcher, P","first_name":"P","last_name":"Schmelcher"}],"article_type":"original","fulldoi":"https://doi.org/10.1103/njcx-z6np","file_date_updated":"2026-10-07T06:55:14Z","OA_place":"publisher","corr_author":"1","abstract":[{"lang":"eng","text":"We investigate the nonequilibrium dynamics of core-hole excitations in a one-dimensional fermionic few-body system consisting of a spin-polarized Fermi bath coupled to a single heavy mobile impurity. The bath is initially prepared in a particle-hole configuration by emptying a selected bath single-particle orbital, while the impurity is displaced with respect to the center of the bath confinement potential. The quench dynamics are initialized by suddenly switching on the impurity-bath interaction. To resolve the resulting dynamics, we combine two complementary ab initio approaches, namely, the MultiLayer MultiConfiguration Time-Dependent Hartree method for mixtures and a multichannel Born-Oppenheimer framework. We show that the postquench response is governed by the interaction strength, impurity confinement, mass imbalance, and the location of the initially prepared hole within the Fermi sea. The density evolution and impurity center-of-mass motion reveal a competition between mixing and demixing of impurity and bath, while the von Neumann entropy demonstrates the buildup of pronounced many-body correlations. Most importantly, the occupation dynamics of the initially emptied orbital identifies deep core holes as substantially more robust against refilling than bulk or edge vacancies. Our results establish core-hole excitations as robust dynamical many-body features in trapped ultracold fermions and provide a controlled route toward probing orthogonality response, correlation buildup, and hole refilling in real time."}],"researchdata_availability":"upon request","arxiv":1,"day":"22","publication_status":"published","volume":8,"publication":"Physical Review Research","DOAJ_listed":"1","type":"journal_article","issue":"3","das_tickbox":"1","article_number":"033346","citation":{"ieee":"A. Becker, G. Koutentakis, and P. Schmelcher, “Core-hole excitation dynamics of one-dimensional ultracold trapped fermions,” <i>Physical Review Research</i>, vol. 8, no. 3. American Physical Society, 2026.","apa":"Becker, A., Koutentakis, G., &#38; Schmelcher, P. (2026). Core-hole excitation dynamics of one-dimensional ultracold trapped fermions. <i>Physical Review Research</i>. American Physical Society. <a href=\"https://doi.org/10.1103/njcx-z6np\">https://doi.org/10.1103/njcx-z6np</a>","chicago":"Becker, A., Georgios Koutentakis, and P Schmelcher. “Core-Hole Excitation Dynamics of One-Dimensional Ultracold Trapped Fermions.” <i>Physical Review Research</i>. American Physical Society, 2026. <a href=\"https://doi.org/10.1103/njcx-z6np\">https://doi.org/10.1103/njcx-z6np</a>.","short":"A. Becker, G. Koutentakis, P. Schmelcher, Physical Review Research 8 (2026).","ista":"Becker A, Koutentakis G, Schmelcher P. 2026. Core-hole excitation dynamics of one-dimensional ultracold trapped fermions. Physical Review Research. 8(3), 033346.","ama":"Becker A, Koutentakis G, Schmelcher P. Core-hole excitation dynamics of one-dimensional ultracold trapped fermions. <i>Physical Review Research</i>. 2026;8(3). doi:<a href=\"https://doi.org/10.1103/njcx-z6np\">10.1103/njcx-z6np</a>","mla":"Becker, A., et al. “Core-Hole Excitation Dynamics of One-Dimensional Ultracold Trapped Fermions.” <i>Physical Review Research</i>, vol. 8, no. 3, 033346, American Physical Society, 2026, doi:<a href=\"https://doi.org/10.1103/njcx-z6np\">10.1103/njcx-z6np</a>."},"dataavailabilitystatement":"The data that support the findings of this article are not publicly available upon publication because it is not technically feasible and/or the cost of preparing, depositing, and hosting the data would be prohibitive within the terms of this research project. The data are available from the authors upon reasonable request.","date_updated":"2026-10-07T06:57:07Z","intvolume":"         8","doi":"10.1103/njcx-z6np","PlanS_conform":"1","tmp":{"name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","image":"/images/cc_by.png","short":"CC BY (4.0)"},"publisher":"American Physical Society","scopus_import":"1","oa":1,"supplementarymaterial":"yes"}]