Bayındır, MehmetTanatar, Bilal2016-02-082016-02-0819981050-2947http://hdl.handle.net/11693/25396We study the Bose-Einstein condensation phenomenon in a two-dimensional (2D) system of bosons subjected to a harmonic-oscillator-type confining potential. The interaction among the 2D bosons is described by a δ function in configuration space. Solving the Gross-Pitaevskii equation within the two-fluid model we calculate the condensate fraction, ground-state energy, and specific heat of the system. Our results indicate that interacting bosons have similar behavior to those of an ideal system for weak interactions.EnglishArticle10.1103/PhysRevA.58.3134