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oai:recercat.cat:2117/1015582026-01-24T04:03:44Zcom_2072_1033col_2072_452950

Quantum halo states in helium tetramers Stipanovic, P. Vranješ Markic, Leandra Boronat Medico, Jordi Universitat Politècnica de Catalunya. Departament de Física Universitat Politècnica de Catalunya. SIMCON - First-principles approaches to condensed matter physics: quantum effects and complexity Àrees temàtiques de la UPC::Física Helium Monte Carlo method Halo states Tetramers Helium clusters Quantum Monte Carlo Heli Montecarlo, Mètode de The universality of quantum halo states enables a comparison of systems from different fields of physics, as demonstrated in two- and three-body clusters. In the present work, we studied weakly bound helium tetramers in order to test whether some of these four-body realistic systems qualify as halos. Their ground-state binding energies and structural properties were thoroughly estimated using the diffusion Monte Carlo method with pure estimators. Helium tetramer properties proved to be less sensitive on the potential model than previously evaluated trimer properties. We predict the existence of realistic four-body halo 4He23He2, whereas 4He4 and 4He33He are close to the border and thus can be used as prototypes of quasi-halo systems. Our results could be tested by the experimental determination of the tetramers’ structural properties using a setup similar to the one developed for the study of helium trimers. Postprint (author's final draft) 2017-01-12 Article Stipanovic, P., Leandra, V., Boronat, J. Quantum halo states in helium tetramers. "Journal of physical chemistry A", 12 Gener 2017, vol. 121, núm. 1, p. 308-314. 1089-5639 https://hdl.handle.net/2117/101558 10.1021/acs.jpca.6b10656 eng http://pubs.acs.org/doi/abs/10.1021/acs.jpca.6b10656 http://creativecommons.org/licenses/by-nc-nd/3.0/es/ Open Access 7 p. application/pdf