What is your thought on the following statement: "any system of (weak/ strong) interacting bosons, in liquid phase, will form a condensate at T=0". Any example or counter-example ? Will dimensionality play any role? Thanks!
No, most bosonic atoms (all except H and He) form solids. In fact, most of the BECs studied experimentally with ultracold atomic gases are metastable. The true ground state is a solid.