Polls Martí, ArturSarlé i Vallés, Enric2017-11-142017-11-142017-06https://hdl.handle.net/2445/117756Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2017, Tutor: Artur PollsWe consider a bidimensional system of few identical bosons trapped in a harmonic well that interact through a two-body gaussian potential. We discuss the ground state energy using a mean-field approximation and introducing pair correlations. To solve the many-body problem we used Monte Carlo techniques: Variational and Diffusion Monte Carlo. We find that two-body correlations lower significantly the energy per particle of the system in the strong interaction limit5 p.application/pdfengcc-by-nc-nd (c) Sarlé, 2017http://creativecommons.org/licenses/by-nc-nd/3.0/es/BosonsMètode de MontecarloTreballs de fi de grauBosonsMonte Carlo methodBachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess