2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16551The behavior of a Bose-Einstein ideal gas of particles in a three dimensional space in the presence of a uniform field, such as gravity, and of contact interaction, describing the presence of one impurity, is investigated. It is shown that Bose-Einstein condensation can not occur.11 pages, RevtexStatistical MechanicsHigh Energy Physics - Theorytext