Morera, IvánAstrakharchik, GrigoriPolls Martí, ArturJuliá-Díaz, Bruno2021-07-062021-07-062020-04-092643-1564https://hdl.handle.net/2445/178862We demonstrate the existence of quantum droplets in two-component one-dimensional Bose-Hubbard chains. The droplets exist for any strength of repulsive intraspecies interactions provided they are balanced by comparable attractive interspecies interactions. The ground-state phase diagram is presented and the different phases are characterized by examining the density profile and off-diagonal one- and two-body correlation functions. A rich variety of phases is found, including atomic superfluid gases, atomic superfluid droplets, pair superfluid droplets, pair superfluid gases, and a Mott-insulator phase. A parameter region prone to be experimentally explored is identified, where the average population per site is lower than three atoms, thus avoiding three-body losses. Finally, the bipartite entanglement of the droplets is found to have a nontrivial dependence on the number of particles.5 p.application/pdfengcc-by (c) Morera, Iván et al., 2020https://creativecommons.org/licenses/by/4.0/Física de partículesBosonsParticle physicsBosonsinfo:eu-repo/semantics/article7011412021-07-06info:eu-repo/semantics/openAccess