Mazzanti Castrillejo, FerranPolls Martí, ArturFabrocini, A.2009-10-062009-10-0620051050-2947https://hdl.handle.net/2445/9585The energy and structure of a dilute hard-disks Bose gas are studied in the framework of a variational many-body approach based on a Jastrow correlated ground-state wave function. The asymptotic behaviors of the radial distribution function and the one-body density matrix are analyzed after solving the Euler equation obtained by a free minimization of the hypernetted chain energy functional. Our results show important deviations from those of the available low density expansions, already at gas parameter values x~0.001 . The condensate fraction in 2D is also computed and found generally lower than the 3D one at the same x.8 p.application/pdfeng(c) The American Physical Society, 2005Matèria condensadaEstadística quànticaGas de Bose-EinsteinCondensed matterQuantum statisticsBose-Einstein gasinfo:eu-repo/semantics/article529476info:eu-repo/semantics/openAccess