Journal article
From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate
- Abstract:
- We experimentally and theoretically investigate the lowest-lying axial excitation of an atomic Bose-Einstein condensate in a cylindrical box trap. By tuning the atomic density, we observe how the nature of the mode changes from a single-particle excitation (in the low-density limit) to a sound wave (in the high-density limit). We elucidate the physics of the crossover between the two limiting regimes using Bogoliubov theory, and find excellent agreement with the measurements. Finally, for large excitation amplitudes we observe a non-exponential decay of the mode, suggesting a nonlinear many-body decay mechanism.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 1.4MB, Terms of use)
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- Publisher copy:
- 10.1103/PhysRevA.99.021601
Authors
- Publisher:
- American Physical Society
- Journal:
- Physical Review A More from this journal
- Volume:
- 99
- Pages:
- 021601(R)
- Publication date:
- 2019-02-01
- Acceptance date:
- 2019-01-11
- DOI:
- EISSN:
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1094-1622
- ISSN:
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1050-2947
- Keywords:
- Pubs id:
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pubs:935837
- UUID:
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uuid:1978c8b5-53be-46c9-8b7c-486e87add421
- Local pid:
-
pubs:935837
- Source identifiers:
-
935837
- Deposit date:
-
2019-01-15
Terms of use
- Copyright holder:
- American Physical Society
- Copyright date:
- 2019
- Notes:
- ©2019 American Physical Society. This is the accepted manuscript version of the article. The final version is available online from American Physical Society at: https://doi.org/10.1103/PhysRevA.99.021601
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