{"oa_version":"Published Version","keyword":["General Physics and Astronomy"],"tmp":{"image":"/images/cc_by.png","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","short":"CC BY (4.0)"},"isi":1,"license":"https://creativecommons.org/licenses/by/4.0/","abstract":[{"lang":"eng","text":"We present a numerical analysis of spin-1/2 fermions in a one-dimensional harmonic potential in the presence of a magnetic point-like impurity at the center of the trap. The model represents a few-body analogue of a magnetic impurity in the vicinity of an s-wave superconductor. Already for a few particles we find a ground-state level crossing between sectors with different fermion parities. We interpret this crossing as a few-body precursor of a quantum phase transition, which occurs when the impurity \"breaks\" a Cooper pair. This picture is further corroborated by analyzing density-density correlations in momentum space. Finally, we discuss how the system may be realized with existing cold-atoms platforms."}],"publisher":"SciPost Foundation","user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","has_accepted_license":"1","oa":1,"external_id":{"isi":["001000325800008"],"arxiv":["2204.01606"]},"year":"2023","language":[{"iso":"eng"}],"day":"24","date_updated":"2023-12-13T11:39:32Z","article_type":"original","publication_identifier":{"issn":["2542-4653"]},"intvolume":"        14","doi":"10.21468/scipostphys.14.1.006","publication":"SciPost Physics","date_published":"2023-01-24T00:00:00Z","title":"Magnetic impurity in a one-dimensional few-fermion system","scopus_import":"1","file_date_updated":"2023-07-31T08:44:38Z","date_created":"2023-07-24T10:48:23Z","article_number":"006","citation":{"apa":"Rammelmüller, L., Huber, D., Čufar, M., Brand, J., Hammer, H.-W., &#38; Volosniev, A. (2023). Magnetic impurity in a one-dimensional few-fermion system. <i>SciPost Physics</i>. SciPost Foundation. <a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">https://doi.org/10.21468/scipostphys.14.1.006</a>","mla":"Rammelmüller, Lukas, et al. “Magnetic Impurity in a One-Dimensional Few-Fermion System.” <i>SciPost Physics</i>, vol. 14, no. 1, 006, SciPost Foundation, 2023, doi:<a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">10.21468/scipostphys.14.1.006</a>.","ista":"Rammelmüller L, Huber D, Čufar M, Brand J, Hammer H-W, Volosniev A. 2023. Magnetic impurity in a one-dimensional few-fermion system. SciPost Physics. 14(1), 006.","ieee":"L. Rammelmüller, D. Huber, M. Čufar, J. Brand, H.-W. Hammer, and A. Volosniev, “Magnetic impurity in a one-dimensional few-fermion system,” <i>SciPost Physics</i>, vol. 14, no. 1. SciPost Foundation, 2023.","ama":"Rammelmüller L, Huber D, Čufar M, Brand J, Hammer H-W, Volosniev A. Magnetic impurity in a one-dimensional few-fermion system. <i>SciPost Physics</i>. 2023;14(1). doi:<a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">10.21468/scipostphys.14.1.006</a>","chicago":"Rammelmüller, Lukas, David Huber, Matija Čufar, Joachim Brand, Hans-Werner Hammer, and Artem Volosniev. “Magnetic Impurity in a One-Dimensional Few-Fermion System.” <i>SciPost Physics</i>. SciPost Foundation, 2023. <a href=\"https://doi.org/10.21468/scipostphys.14.1.006\">https://doi.org/10.21468/scipostphys.14.1.006</a>.","short":"L. Rammelmüller, D. Huber, M. Čufar, J. Brand, H.-W. Hammer, A. Volosniev, SciPost Physics 14 (2023)."},"month":"01","author":[{"full_name":"Rammelmüller, Lukas","first_name":"Lukas","last_name":"Rammelmüller"},{"first_name":"David","last_name":"Huber","full_name":"Huber, David"},{"last_name":"Čufar","first_name":"Matija","full_name":"Čufar, Matija"},{"last_name":"Brand","first_name":"Joachim","full_name":"Brand, Joachim"},{"full_name":"Hammer, Hans-Werner","first_name":"Hans-Werner","last_name":"Hammer"},{"orcid":"0000-0003-0393-5525","first_name":"Artem","last_name":"Volosniev","id":"37D278BC-F248-11E8-B48F-1D18A9856A87","full_name":"Volosniev, Artem"}],"file":[{"date_created":"2023-07-31T08:44:38Z","file_id":"13328","file_size":1163444,"relation":"main_file","date_updated":"2023-07-31T08:44:38Z","creator":"dernst","content_type":"application/pdf","success":1,"access_level":"open_access","checksum":"ffdb70b9ae7aa45ea4ea6096ecbd6431","file_name":"2023_SciPostPhysics_Rammelmueller.pdf"}],"_id":"13278","status":"public","quality_controlled":"1","publication_status":"published","volume":14,"issue":"1","department":[{"_id":"MiLe"}],"ddc":["530"],"article_processing_charge":"No","type":"journal_article"}