Rotons and their damping in elongated dipolar Bose-Einstein condensates
Quantum Gases
2022-08-17 v2 Strongly Correlated Electrons
Abstract
We discuss finite temperature damping of rotons in elongated Bose-condensed dipolar gases, which are in the Thomas-Fermi regime in the tightly confined directions. The presence of many branches of excitations which can participate in the damping process, is crucial for the Landau damping and results in significant increase of the damping rate. It is found, however, that even rotons with energies close to the roton gap may remain fairly stable in systems with the roton gap as small as 1nK.
Keywords
Cite
@article{arxiv.2112.06835,
title = {Rotons and their damping in elongated dipolar Bose-Einstein condensates},
author = {S. I. Matveenko and M. S. Bahovadinov and M. A. Baranov and G. V. Shlyapnikov},
journal= {arXiv preprint arXiv:2112.06835},
year = {2022}
}
Comments
8 pages, 4 figures, results of numerical calculations are added