Bose condensation is usually a low temperature phenomenon due to a low
particle number density. When the number density is kept large compared to the
inverse Compton volume, Bose condensation can occur at a temperature much
higher than the mass of the particle. We can then use a three dimensional
effective theory to study the thermal properties. We compute the transition
temperature for a complex scalar field theory with a small interaction
parameter.Comment: 8 pages, 2 figures, late
