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oai:recercat.cat:2117/1222722026-01-21T04:32:25Zcom_2072_1033col_2072_452950

00925njm 22002777a 4500 dc Guijarro Gámez, Grecia author Pricoupenko, A. author Astrakharchik, Grigori author Boronat Medico, Jordi author Petrov, D. S. author 2018-06-14 We solve the three-boson problem with contact two- and three-body interactions in one dimension and analytically calculate the ground and excited trimer-state energies. Then, by using the diffusion Monte Carlo technique, we calculate the binding energy of three dimers formed in a one-dimensional Bose-Bose or Fermi-Bose mixture with attractive interspecies and repulsive intraspecies interactions. Combining these results with our three-body analytics, we extract the three-dimer scattering length close to the dimer-dimer zero crossing. In both considered cases, the three-dimer interaction turns out to be repulsive. Our results constitute a concrete proposal for obtaining a one-dimensional gas with a pure three-body repulsion. Peer Reviewed Postprint (published version) Àrees temàtiques de la UPC::Física Monte Carlo method Bosons Bosons Montecarlo, Mètode de One-dimensional three-boson problem with two- and three-body interactions