Abstract
We present a Monte Carlo calculation for up to bosons in 3D to determine the shift of the transition temperature due to small interactions . We generate independent configurations of the ideal gas. At finite , the superfluid density changes by a certain correlation function in the limit ; the limit is taken afterwards. We argue that our result is independent of the order of limits. Detailed knowledge of the noninteracting system for finite allows us to avoid finite-size scaling assumptions.
- Received 18 May 1999
DOI:https://doi.org/10.1103/PhysRevLett.83.2687
©1999 American Physical Society