Particle fluctuations in nonuniform and trapped Bose gases

TL;DR

This paper investigates particle fluctuations in nonuniform Bose gases, including trapped atoms, demonstrating that proper analysis yields thermodynamically normal fluctuations regardless of system inhomogeneity.

Contribution

It clarifies the nature of particle fluctuations in nonuniform Bose systems, emphasizing the importance of correct theoretical descriptions for interacting atoms.

Findings

Particle fluctuations are thermodynamically normal in nonuniform Bose gases.

Proper theoretical treatment is essential for accurate fluctuation analysis.

Results apply to trapped Bose-Einstein condensates.

Abstract

The problem of particle fluctuations in arbitrary nonuniform systems with Bose-Einstein condensate is considered. This includes the case of trapped Bose atoms. It is shown that the correct description of particle fluctuations for any nonuniform system of interacting atoms always results in thermodynamically normal fluctuations.