Interaction-induced crossover versus finite-size condensation in a weakly interacting trapped one-dimensional Bose gas

Isabelle Bouchoule, Karen V. Kheruntsyan, Gora Shlyapnikov

We discuss the transition from a fully decoherent to a (quasi-)condensate regime in a harmonically trapped weakly interacting 1D Bose gas. By using analytic approaches and verifyin…