Rotons and their damping in elongated dipolar Bose-Einstein condensates
| Autor: | S. I. Matveenko, M. S. Bahovadinov, M. A. Baranov, G. V. Shlyapnikov |
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| Rok vydání: | 2021 |
| Předmět: |
Condensed Matter::Quantum Gases
Condensed Matter - Strongly Correlated Electrons Strongly Correlated Electrons (cond-mat.str-el) Condensed Matter::Other Quantum Gases (cond-mat.quant-gas) FOS: Physical sciences Condensed Matter - Quantum Gases Condensed Matter::Mesoscopic Systems and Quantum Hall Effect |
| DOI: | 10.48550/arxiv.2112.06835 |
| Popis: | 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. Comment: 8 pages, 4 figures, results of numerical calculations are added |
| Databáze: | OpenAIRE |
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