The density dependence of the transition temperature in a homogenous Bose flui

Abstract

Transition temperature data obtained as a function of particle density in the ${}^4$He-Vycor system are compared with recent theoretical calculations for 3D Bose condensed systems. In the low density dilute Bose gas regime we find, in agreement with theory, a positive shift in the transition temperature of the form $\Delta T/T_0=\gamma (n{a}^3{)}^{1/3}$. At higher densities a maximum is found in the ratio of $T_c/T_0$ for a value of the interaction parameter, na${}^3$, that is in agreement with path-integral Monte Carlo calculations.

4 pages, 3 figures