Renormalization-Group Theory and Universality along the Lambda Line of 4He
V. Dohm
Abstract
The present status of the renormalization-group (RG) predictions on the superfluid density ρs and the specific heat C+ and C- near the λ-line of 4He is briefly reviewed. Particular attention is given to universal amplitude ratios related to these quantities. The goals of a new theory project are presented that involves higher-order calculations of the amplitude functions of ρs, C+ and C- which are of fundamental importance for a test of the universality predictions of the RG theory.
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