Nilsen, J. K.Mur Petit, JordiGuilleumas, MontserratHjorth-Jensen, M.Polls Martí, Artur2009-10-062009-10-0620051050-2947https://hdl.handle.net/2445/9583In this work we compare the results of the Gross-Pitaevskii and modified Gross-Pitaevskii equations with ab initio variational Monte Carlo calculations for Bose-Einstein condensates of atoms in axially symmetric traps. We examine both the ground state and excited states having a vortex line along the z axis at high values of the gas parameter and demonstrate an excellent agreement between the modified Gross-Pitaevskii and ab initio Monte Carlo methods, both for the ground and vortex states.7 p.application/pdfeng(c) The American Physical Society, 2005Condensació de Bose-EinsteinEquacions en derivades parcialsMètode de MontecarloBose-Einstein condensationPartial differential equationsMonte Carlo methodinfo:eu-repo/semantics/article525868info:eu-repo/semantics/openAccess