Surface tension of Bose-Einstein condensate at finite temperature
Quantum Gases
2025-02-04 v1
Abstract
We examine the influence of nonzero temperature on a bounded surface of a dilute Bose gas confined by a hard wall, utilizing the Gross-Pitaevskii theory and the Bogoliubov-de Gennes equation to describe surface excitations. The theoretical calculations are compared with experimental data for liquid helium II, demonstrating excellent agreement. An empirical relation is found for the temperature-dependence of the surface tension. Furthermore, our findings indicate that the contribution of surface excitations remains below 0.7\% in the most of recent experiments on Bose-Einstein condensate.
Keywords
Cite
@article{arxiv.2502.01104,
title = {Surface tension of Bose-Einstein condensate at finite temperature},
author = {Nguyen Van Thu},
journal= {arXiv preprint arXiv:2502.01104},
year = {2025}
}