Ideal Bose Einstein condensation and disorder effects

P. Lacour-Gayet , G. Toulouse

Ideal Bose Einstein condensation is studied as a cooperative phase transition for arbitrary dimensionality. The correspondence with the n → ∞ limit of the n-vector model in the constant volume case and with the n = — 2 limit in the constant pressure case is discussed and precised. The influence of a special type of disorder (random sources and sinks) is studied ; a sharp phase transition occurs with new critical exponents which are calculated and shown to violate some scaling laws.

Mots clés: boson systems; condensation; phase diagrams; quantum statistical mechanics

Domaines: Articles anciens

P. Lacour-Gayet, G. Toulouse. Ideal Bose Einstein condensation and disorder effects. Journal de Physique, 1974, 35 (5), pp.425-432. ⟨10.1051/jphys:01974003505042500⟩. ⟨jpa-00208165⟩