[{"doi":"10.1063/1.4921227","article_number":"052105","citation":{"ama":"Safari L, Santos J, Amaro P, Jänkälä K, Fratini F. Analytical evaluation of atomic form factors: Application to Rayleigh scattering. <i>Journal of Mathematical Physics</i>. 2015;56(5). doi:<a href=\"https://doi.org/10.1063/1.4921227\">10.1063/1.4921227</a>","apa":"Safari, L., Santos, J., Amaro, P., Jänkälä, K., &#38; Fratini, F. (2015). Analytical evaluation of atomic form factors: Application to Rayleigh scattering. <i>Journal of Mathematical Physics</i>. American Institute of Physics. <a href=\"https://doi.org/10.1063/1.4921227\">https://doi.org/10.1063/1.4921227</a>","ista":"Safari L, Santos J, Amaro P, Jänkälä K, Fratini F. 2015. Analytical evaluation of atomic form factors: Application to Rayleigh scattering. Journal of Mathematical Physics. 56(5), 052105.","short":"L. Safari, J. Santos, P. Amaro, K. Jänkälä, F. Fratini, Journal of Mathematical Physics 56 (2015).","mla":"Safari, Laleh, et al. “Analytical Evaluation of Atomic Form Factors: Application to Rayleigh Scattering.” <i>Journal of Mathematical Physics</i>, vol. 56, no. 5, 052105, American Institute of Physics, 2015, doi:<a href=\"https://doi.org/10.1063/1.4921227\">10.1063/1.4921227</a>.","chicago":"Safari, Laleh, José Santos, Pedro Amaro, Kari Jänkälä, and Filippo Fratini. “Analytical Evaluation of Atomic Form Factors: Application to Rayleigh Scattering.” <i>Journal of Mathematical Physics</i>. American Institute of Physics, 2015. <a href=\"https://doi.org/10.1063/1.4921227\">https://doi.org/10.1063/1.4921227</a>.","ieee":"L. Safari, J. Santos, P. Amaro, K. Jänkälä, and F. Fratini, “Analytical evaluation of atomic form factors: Application to Rayleigh scattering,” <i>Journal of Mathematical Physics</i>, vol. 56, no. 5. American Institute of Physics, 2015."},"volume":56,"user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","corr_author":"1","date_created":"2018-12-11T11:54:08Z","arxiv":1,"type":"journal_article","publication":"Journal of Mathematical Physics","status":"public","oa_version":"Preprint","_id":"1811","day":"20","intvolume":"        56","publication_status":"published","acknowledgement":"The research leading to these results has received funding from the People Programme (Marie Curie Actions) of the European Union’s Seventh Framework Programme (FP7/2007-2013) under REA grant agreement n◦ [291734]. F.F. acknowledges support by Fundação de Amparo à Pesquisa do estado de Minas Gerais (FAPEMIG), by Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), and by the Austrian Science Fund (FWF) through the START Grant No. Y 591-N16.","scopus_import":"1","project":[{"_id":"25681D80-B435-11E9-9278-68D0E5697425","call_identifier":"FP7","name":"International IST Postdoc Fellowship Programme","grant_number":"291734"}],"publisher":"American Institute of Physics","abstract":[{"text":"Atomic form factors are widely used for the characterization of targets and specimens, from crystallography to biology. By using recent mathematical results, here we derive an analytical expression for the atomic form factor within the independent particle model constructed from nonrelativistic screened hydrogenic wave functions. The range of validity of this analytical expression is checked by comparing the analytically obtained form factors with the ones obtained within the Hartee-Fock method. As an example, we apply our analytical expression for the atomic form factor to evaluate the differential cross section for Rayleigh scattering off neutral atoms.","lang":"eng"}],"isi":1,"language":[{"iso":"eng"}],"year":"2015","month":"05","oa":1,"ec_funded":1,"external_id":{"isi":["000355920800016"],"arxiv":["1409.0110"]},"article_processing_charge":"No","department":[{"_id":"MiLe"}],"author":[{"id":"3C325E5E-F248-11E8-B48F-1D18A9856A87","first_name":"Laleh","last_name":"Safari","full_name":"Safari, Laleh"},{"full_name":"Santos, José","last_name":"Santos","first_name":"José"},{"full_name":"Amaro, Pedro","last_name":"Amaro","first_name":"Pedro"},{"last_name":"Jänkälä","first_name":"Kari","full_name":"Jänkälä, Kari"},{"first_name":"Filippo","last_name":"Fratini","full_name":"Fratini, Filippo"}],"main_file_link":[{"url":"http://arxiv.org/abs/1409.0110","open_access":"1"}],"date_published":"2015-05-20T00:00:00Z","publist_id":"5295","title":"Analytical evaluation of atomic form factors: Application to Rayleigh scattering","issue":"5","date_updated":"2025-09-23T07:53:00Z"},{"tmp":{"image":"/images/cc_by.png","short":"CC BY (4.0)","legal_code_url":"https://creativecommons.org/licenses/by/4.0/legalcode","name":"Creative Commons Attribution 4.0 International Public License (CC-BY 4.0)"},"department":[{"_id":"MiLe"}],"external_id":{"isi":["000354022400001"]},"article_processing_charge":"No","title":"Exotic roton excitations in quadrupolar Bose–Einstein condensates ","date_updated":"2025-09-23T08:45:19Z","issue":"4","author":[{"last_name":"Lahrz","first_name":"Martin","full_name":"Lahrz, Martin"},{"orcid":"0000-0002-6990-7802","last_name":"Lemeshko","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","first_name":"Mikhail","full_name":"Lemeshko, Mikhail"},{"last_name":"Mathey","first_name":"Ludwig","full_name":"Mathey, Ludwig"}],"publist_id":"5294","date_published":"2015-04-01T00:00:00Z","abstract":[{"text":"We investigate the occurrence of rotons in a quadrupolar Bose–Einstein condensate confined to two dimensions. Depending on the particle density, the ratio of the contact and quadrupole–quadrupole interactions, and the alignment of the quadrupole moments with respect to the confinement plane, the dispersion relation features two or four point-like roton minima or one ring-shaped minimum. We map out the entire parameter space of the roton behavior and identify the instability regions. We propose to observe the exotic rotons by monitoring the characteristic density wave dynamics resulting from a short local perturbation, and discuss the possibilities to detect the predicted effects in state-of-the-art experiments with ultracold homonuclear molecules.\r\n","lang":"eng"}],"pubrep_id":"446","publisher":"IOP Publishing","year":"2015","month":"04","language":[{"iso":"eng"}],"isi":1,"oa":1,"date_created":"2018-12-11T11:54:09Z","publication":"New Journal of Physics","status":"public","oa_version":"Published Version","type":"journal_article","intvolume":"        17","day":"01","publication_status":"published","_id":"1812","scopus_import":"1","ddc":["530"],"has_accepted_license":"1","doi":"10.1088/1367-2630/17/4/045005","volume":17,"license":"https://creativecommons.org/licenses/by/4.0/","citation":{"ama":"Lahrz M, Lemeshko M, Mathey L. Exotic roton excitations in quadrupolar Bose–Einstein condensates . <i>New Journal of Physics</i>. 2015;17(4). doi:<a href=\"https://doi.org/10.1088/1367-2630/17/4/045005\">10.1088/1367-2630/17/4/045005</a>","short":"M. Lahrz, M. Lemeshko, L. Mathey, New Journal of Physics 17 (2015).","ista":"Lahrz M, Lemeshko M, Mathey L. 2015. Exotic roton excitations in quadrupolar Bose–Einstein condensates . New Journal of Physics. 17(4), 045005.","apa":"Lahrz, M., Lemeshko, M., &#38; Mathey, L. (2015). Exotic roton excitations in quadrupolar Bose–Einstein condensates . <i>New Journal of Physics</i>. IOP Publishing. <a href=\"https://doi.org/10.1088/1367-2630/17/4/045005\">https://doi.org/10.1088/1367-2630/17/4/045005</a>","mla":"Lahrz, Martin, et al. “Exotic Roton Excitations in Quadrupolar Bose–Einstein Condensates .” <i>New Journal of Physics</i>, vol. 17, no. 4, 045005, IOP Publishing, 2015, doi:<a href=\"https://doi.org/10.1088/1367-2630/17/4/045005\">10.1088/1367-2630/17/4/045005</a>.","chicago":"Lahrz, Martin, Mikhail Lemeshko, and Ludwig Mathey. “Exotic Roton Excitations in Quadrupolar Bose–Einstein Condensates .” <i>New Journal of Physics</i>. IOP Publishing, 2015. <a href=\"https://doi.org/10.1088/1367-2630/17/4/045005\">https://doi.org/10.1088/1367-2630/17/4/045005</a>.","ieee":"M. Lahrz, M. Lemeshko, and L. Mathey, “Exotic roton excitations in quadrupolar Bose–Einstein condensates ,” <i>New Journal of Physics</i>, vol. 17, no. 4. IOP Publishing, 2015."},"article_number":"045005","file_date_updated":"2020-07-14T12:45:17Z","quality_controlled":"1","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","file":[{"checksum":"551f751a75b39b89a1db2f7f498f9a49","file_size":1900925,"date_updated":"2020-07-14T12:45:17Z","file_id":"5184","content_type":"application/pdf","relation":"main_file","access_level":"open_access","creator":"system","file_name":"IST-2016-446-v1+1_document.pdf","date_created":"2018-12-12T10:15:59Z"}]},{"oa":1,"month":"05","year":"2015","language":[{"iso":"eng"}],"isi":1,"abstract":[{"lang":"eng","text":"We develop a microscopic theory describing a quantum impurity whose rotational degree of freedom is coupled to a many-particle bath. We approach the problem by introducing the concept of an “angulon”—a quantum rotor dressed by a quantum field—and reveal its quasiparticle properties using a combination of variational and diagrammatic techniques. Our theory predicts renormalization of the impurity rotational structure, such as that observed in experiments with molecules in superfluid helium droplets, in terms of a rotational Lamb shift induced by the many-particle environment. Furthermore, we discover a rich many-body-induced fine structure, emerging in rotational spectra due to a redistribution of angular momentum within the quantum many-body system."}],"publisher":"American Physical Society","date_updated":"2025-09-23T10:40:28Z","title":"Rotation of quantum impurities in the presence of a many-body environment","issue":"20","main_file_link":[{"open_access":"1","url":"http://arxiv.org/abs/1502.03447"}],"author":[{"first_name":"Richard","last_name":"Schmidt","full_name":"Schmidt, Richard"},{"full_name":"Lemeshko, Mikhail","first_name":"Mikhail","id":"37CB05FA-F248-11E8-B48F-1D18A9856A87","orcid":"0000-0002-6990-7802","last_name":"Lemeshko"}],"publist_id":"5293","date_published":"2015-05-18T00:00:00Z","department":[{"_id":"MiLe"}],"external_id":{"isi":["000354969900003"],"arxiv":["1502.03447"]},"article_processing_charge":"No","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","quality_controlled":"1","volume":114,"citation":{"mla":"Schmidt, Richard, and Mikhail Lemeshko. “Rotation of Quantum Impurities in the Presence of a Many-Body Environment.” <i>Physical Review Letters</i>, vol. 114, no. 20, 203001, American Physical Society, 2015, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.114.203001\">10.1103/PhysRevLett.114.203001</a>.","apa":"Schmidt, R., &#38; Lemeshko, M. (2015). Rotation of quantum impurities in the presence of a many-body environment. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.114.203001\">https://doi.org/10.1103/PhysRevLett.114.203001</a>","short":"R. Schmidt, M. Lemeshko, Physical Review Letters 114 (2015).","ista":"Schmidt R, Lemeshko M. 2015. Rotation of quantum impurities in the presence of a many-body environment. Physical Review Letters. 114(20), 203001.","ama":"Schmidt R, Lemeshko M. Rotation of quantum impurities in the presence of a many-body environment. <i>Physical Review Letters</i>. 2015;114(20). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.114.203001\">10.1103/PhysRevLett.114.203001</a>","ieee":"R. Schmidt and M. Lemeshko, “Rotation of quantum impurities in the presence of a many-body environment,” <i>Physical Review Letters</i>, vol. 114, no. 20. American Physical Society, 2015.","chicago":"Schmidt, Richard, and Mikhail Lemeshko. “Rotation of Quantum Impurities in the Presence of a Many-Body Environment.” <i>Physical Review Letters</i>. American Physical Society, 2015. <a href=\"https://doi.org/10.1103/PhysRevLett.114.203001\">https://doi.org/10.1103/PhysRevLett.114.203001</a>."},"article_number":"203001","doi":"10.1103/PhysRevLett.114.203001","scopus_import":"1","intvolume":"       114","day":"18","publication_status":"published","_id":"1813","oa_version":"Preprint","status":"public","publication":"Physical Review Letters","type":"journal_article","arxiv":1,"date_created":"2018-12-11T11:54:09Z","corr_author":"1"},{"oa_version":"Submitted Version","publication":"Physical Review Letters","status":"public","type":"journal_article","date_created":"2018-12-11T11:55:06Z","arxiv":1,"scopus_import":"1","publication_status":"published","day":"08","intvolume":"       113","_id":"1995","citation":{"ama":"Fratini F, Mascarenhas E, Safari L, et al. Fabry-Perot interferometer with quantum mirrors: Nonlinear light transport and rectification. <i>Physical Review Letters</i>. 2014;113(24). doi:<a href=\"https://doi.org/10.1103/PhysRevLett.113.243601\">10.1103/PhysRevLett.113.243601</a>","apa":"Fratini, F., Mascarenhas, E., Safari, L., Poizat, J., Valente, D., Auffèves, A., … Santos, M. (2014). Fabry-Perot interferometer with quantum mirrors: Nonlinear light transport and rectification. <i>Physical Review Letters</i>. American Physical Society. <a href=\"https://doi.org/10.1103/PhysRevLett.113.243601\">https://doi.org/10.1103/PhysRevLett.113.243601</a>","short":"F. Fratini, E. Mascarenhas, L. Safari, J. Poizat, D. Valente, A. Auffèves, D. Gerace, M. Santos, Physical Review Letters 113 (2014).","ista":"Fratini F, Mascarenhas E, Safari L, Poizat J, Valente D, Auffèves A, Gerace D, Santos M. 2014. Fabry-Perot interferometer with quantum mirrors: Nonlinear light transport and rectification. Physical Review Letters. 113(24), 243601.","mla":"Fratini, Filippo, et al. “Fabry-Perot Interferometer with Quantum Mirrors: Nonlinear Light Transport and Rectification.” <i>Physical Review Letters</i>, vol. 113, no. 24, 243601, American Physical Society, 2014, doi:<a href=\"https://doi.org/10.1103/PhysRevLett.113.243601\">10.1103/PhysRevLett.113.243601</a>.","chicago":"Fratini, Filippo, Eduardo Mascarenhas, Laleh Safari, Jean Poizat, Daniel Valente, Alexia Auffèves, Dario Gerace, and Marcelo Santos. “Fabry-Perot Interferometer with Quantum Mirrors: Nonlinear Light Transport and Rectification.” <i>Physical Review Letters</i>. American Physical Society, 2014. <a href=\"https://doi.org/10.1103/PhysRevLett.113.243601\">https://doi.org/10.1103/PhysRevLett.113.243601</a>.","ieee":"F. Fratini <i>et al.</i>, “Fabry-Perot interferometer with quantum mirrors: Nonlinear light transport and rectification,” <i>Physical Review Letters</i>, vol. 113, no. 24. American Physical Society, 2014."},"volume":113,"article_number":"243601","doi":"10.1103/PhysRevLett.113.243601","user_id":"317138e5-6ab7-11ef-aa6d-ffef3953e345","quality_controlled":"1","ec_funded":1,"title":"Fabry-Perot interferometer with quantum mirrors: Nonlinear light transport and rectification","issue":"24","date_updated":"2025-09-29T12:06:45Z","date_published":"2014-12-08T00:00:00Z","publist_id":"5085","main_file_link":[{"open_access":"1","url":"http://arxiv.org/abs/1410.5972"}],"author":[{"full_name":"Fratini, Filippo","first_name":"Filippo","last_name":"Fratini"},{"full_name":"Mascarenhas, Eduardo","first_name":"Eduardo","last_name":"Mascarenhas"},{"id":"3C325E5E-F248-11E8-B48F-1D18A9856A87","first_name":"Laleh","last_name":"Safari","full_name":"Safari, Laleh"},{"full_name":"Poizat, Jean","first_name":"Jean","last_name":"Poizat"},{"first_name":"Daniel","last_name":"Valente","full_name":"Valente, Daniel"},{"full_name":"Auffèves, Alexia","last_name":"Auffèves","first_name":"Alexia"},{"last_name":"Gerace","first_name":"Dario","full_name":"Gerace, Dario"},{"first_name":"Marcelo","last_name":"Santos","full_name":"Santos, Marcelo"}],"department":[{"_id":"MiLe"}],"article_processing_charge":"No","external_id":{"arxiv":["1410.5972"],"isi":["000346049700005"]},"abstract":[{"text":"Optical transport represents a natural route towards fast communications, and it is currently used in large scale data transfer. The progressive miniaturization of devices for information processing calls for the microscopic tailoring of light transport and confinement at length scales appropriate for upcoming technologies. With this goal in mind, we present a theoretical analysis of a one-dimensional Fabry-Perot interferometer built with two highly saturable nonlinear mirrors: a pair of two-level systems. Our approach captures nonlinear and nonreciprocal effects of light transport that were not reported previously. Remarkably, we show that such an elementary device can operate as a microscopic integrated optical rectifier.","lang":"eng"}],"publisher":"American Physical Society","project":[{"grant_number":"291734","name":"International IST Postdoc Fellowship Programme","_id":"25681D80-B435-11E9-9278-68D0E5697425","call_identifier":"FP7"}],"oa":1,"year":"2014","month":"12","language":[{"iso":"eng"}],"isi":1}]