Quantum Borderlines -- Fluctuation Energies in Ultracold Bose Gases
Quantum Gases
2025-05-22 v2
Abstract
Ultracold Bose gases are many-body systems with well-defined particle interactions that may serve as models for interacting quantum fields. The impact of virtual excitations is studied in the spatial transition zone created by a soft confinement potential that separates a degenerate ideal gas from a dense quasi-condensate. We compute within Bogoliubov theory the contribution of quasi-particles to the surface energy at zero temperature.
Keywords
Cite
@article{arxiv.2503.21908,
title = {Quantum Borderlines -- Fluctuation Energies in Ultracold Bose Gases},
author = {Carsten Henkel},
journal= {arXiv preprint arXiv:2503.21908},
year = {2025}
}
Comments
Focus Issue "Casimir Effect and its Role in Modern Physics'', referee comments included. Contains supplementary material (appendices)