{"article_processing_charge":"Yes","language":[{"iso":"eng"}],"date_published":"2022-08-11T00:00:00Z","author":[{"last_name":"Cherepanov","first_name":"Igor","full_name":"Cherepanov, Igor","id":"339C7E5A-F248-11E8-B48F-1D18A9856A87"},{"last_name":"Bighin","first_name":"Giacomo","full_name":"Bighin, Giacomo","id":"4CA96FD4-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0001-8823-9777"},{"full_name":"Schouder, Constant A.","first_name":"Constant A.","last_name":"Schouder"},{"first_name":"Adam S.","last_name":"Chatterley","full_name":"Chatterley, Adam S."},{"first_name":"Henrik","last_name":"Stapelfeldt","full_name":"Stapelfeldt, Henrik"},{"orcid":"0000-0002-6990-7802","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","full_name":"Lemeshko, Mikhail","last_name":"Lemeshko","first_name":"Mikhail"}],"publication_identifier":{"issn":["1367-2630"]},"issue":"7","status":"public","ec_funded":1,"publisher":"IOP","user_id":"4359f0d1-fa6c-11eb-b949-802e58b17ae8","abstract":[{"text":"Recently it became possible to study highly excited rotational states of molecules in superfluid helium through nonadiabatic alignment experiments (Cherepanov et al 2021 Phys. Rev. A 104 L061303). This calls for theoretical approaches that go beyond explaining renormalized values of molecular spectroscopic constants, which suffices when only the lowest few rotational states are involved. As the first step in this direction, here we present a basic quantum mechanical model describing highly excited rotational states of molecules in superfluid helium nanodroplets. We show that a linear molecule immersed in a superfluid can be seen as an effective symmetric top, similar to the rotational structure of radicals, such as OH or NO, but with the angular momentum of the superfluid playing the role of the electronic angular momentum in free molecules. The simple theory sheds light onto what happens when the rotational angular momentum of the molecule increases beyond the lowest excited states accessible by infrared spectroscopy. In addition, the model allows to estimate the effective rotational and centrifugal distortion constants for a broad range of species and to explain the crossover between light and heavy molecules in superfluid 4He in terms of the many-body wavefunction structure. Some of the above mentioned insights can be acquired by analyzing a simple 2 × 2 matrix.","lang":"eng"}],"publication":"New Journal of Physics","quality_controlled":"1","day":"11","file_date_updated":"2022-08-29T09:57:40Z","has_accepted_license":"1","scopus_import":"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)"},"date_created":"2022-08-28T22:02:01Z","oa":1,"_id":"11998","title":"A simple model for high rotational excitations of molecules in a superfluid","ddc":["530"],"article_type":"original","acknowledgement":"IC acknowledges the support by the European Union's Horizon 2020 research and innovation programme under the Marie Skłodowska-Curie Grant Agreement No. 665385. GB acknowledges support from the Austrian Science Fund (FWF), under Project No. M2461-N27 and from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) under Germany's Excellence Strategy EXC2181/1-390900948 (the Heidelberg STRUCTURES Excellence Cluster). ML acknowledges support by the Austrian Science Fund (FWF), under Project No. P29902-N27, and by the European Research Council (ERC) starting Grant No. 801770 (ANGULON). HS acknowledges support from the Independent Research Fund Denmark (Project No. 8021-00232B) and from the Villum Fonden through a Villum Investigator Grant No. 25886.","type":"journal_article","month":"08","department":[{"_id":"MiLe"}],"publication_status":"published","citation":{"ieee":"I. Cherepanov, G. Bighin, C. A. Schouder, A. S. Chatterley, H. Stapelfeldt, and M. Lemeshko, “A simple model for high rotational excitations of molecules in a superfluid,” <i>New Journal of Physics</i>, vol. 24, no. 7. IOP, 2022.","ista":"Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Stapelfeldt H, Lemeshko M. 2022. A simple model for high rotational excitations of molecules in a superfluid. New Journal of Physics. 24(7), 075004.","chicago":"Cherepanov, Igor, Giacomo Bighin, Constant A. Schouder, Adam S. Chatterley, Henrik Stapelfeldt, and Mikhail Lemeshko. “A Simple Model for High Rotational Excitations of Molecules in a Superfluid.” <i>New Journal of Physics</i>. IOP, 2022. <a href=\"https://doi.org/10.1088/1367-2630/ac8113\">https://doi.org/10.1088/1367-2630/ac8113</a>.","ama":"Cherepanov I, Bighin G, Schouder CA, Chatterley AS, Stapelfeldt H, Lemeshko M. A simple model for high rotational excitations of molecules in a superfluid. <i>New Journal of Physics</i>. 2022;24(7). doi:<a href=\"https://doi.org/10.1088/1367-2630/ac8113\">10.1088/1367-2630/ac8113</a>","short":"I. Cherepanov, G. Bighin, C.A. Schouder, A.S. Chatterley, H. Stapelfeldt, M. Lemeshko, New Journal of Physics 24 (2022).","apa":"Cherepanov, I., Bighin, G., Schouder, C. A., Chatterley, A. S., Stapelfeldt, H., &#38; Lemeshko, M. (2022). A simple model for high rotational excitations of molecules in a superfluid. <i>New Journal of Physics</i>. IOP. <a href=\"https://doi.org/10.1088/1367-2630/ac8113\">https://doi.org/10.1088/1367-2630/ac8113</a>","mla":"Cherepanov, Igor, et al. “A Simple Model for High Rotational Excitations of Molecules in a Superfluid.” <i>New Journal of Physics</i>, vol. 24, no. 7, 075004, IOP, 2022, doi:<a href=\"https://doi.org/10.1088/1367-2630/ac8113\">10.1088/1367-2630/ac8113</a>."},"year":"2022","doi":"10.1088/1367-2630/ac8113","isi":1,"intvolume":"        24","volume":24,"article_number":"075004","date_updated":"2023-08-03T13:19:06Z","external_id":{"isi":["000839216900001"]},"project":[{"name":"International IST Doctoral Program","grant_number":"665385","_id":"2564DBCA-B435-11E9-9278-68D0E5697425","call_identifier":"H2020"},{"grant_number":"801770","_id":"2688CF98-B435-11E9-9278-68D0E5697425","call_identifier":"H2020","name":"Angulon: physics and applications of a new quasiparticle"},{"name":"A path-integral approach to composite impurities","grant_number":"M02641","call_identifier":"FWF","_id":"26986C82-B435-11E9-9278-68D0E5697425"}],"file":[{"relation":"main_file","creator":"alisjak","success":1,"date_created":"2022-08-29T09:57:40Z","file_id":"12005","content_type":"application/pdf","access_level":"open_access","file_name":"2022_NewJournalofPhysics_Cherepanov.pdf","file_size":1912882,"checksum":"10116a08d3489befc13dba2cc44490f1","date_updated":"2022-08-29T09:57:40Z"}],"oa_version":"Published Version"}