We derive an approximate closed form for the infinitesimal generator of the renormalization group for the interacting Bose fluid. The Bose-condensed phase is treated by the method of Bogoliubov, and a simple scaling law is found for the condensate density. It is shown that the quantum-mechanical features are irrelevant close to the λ line. This is demonstrated by calculating the critical behavior in 4-ε dimensions to order ε.
|Journal||Physical review A: Atomic, molecular, and optical physics|
|Publication status||Published - 1983|
Creswick, R. J., & Wiegel, F. W. (1983). Renormalization theory of the interacting Bose fluid. Physical review A: Atomic, molecular, and optical physics, 28(3), 1579-1586. https://doi.org/10.1103/PhysRevA.28.1579