Comment on "Interface tension of Bose-Einstein condensates" by Bert Van Schaeybroeck, Phys. Rev. A 78, 023624-9 (2008)

TL;DR

This comment highlights a potential universal coefficient linking interface tension in Bose-Einstein condensates and surface tension in type-I superconductors, suggesting a possible exact result worth further verification.

Contribution

It proposes a universal coefficient connecting two different physical systems' interface tensions, indicating a deeper underlying relation.

Findings

Numerical coefficient agreement suggests universality.

Potential for an exact analytical result.

Relevance across Bose-Einstein condensates and superconductors.

Abstract

The purpose of the comment is to point out that the leading term of the Ginzburg-Landau nonanalytical correction to the interface tension of Bose-Einstein condensates with strong segregation and the surface tension of extreme type-I superconductors are described by a common coefficient derived from the universal equation for the phase boundary. The agreement between the numerical value of the coefficients gives a hint that this can be an exact result which deserves to be checked. The outcome will be of interest for physicists working in both fields.