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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 lar...

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Publication status:
Published
Peer review status:
Peer reviewed
Version:
Accepted Manuscript

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Publisher copy:
10.1103/PhysRevA.99.021601

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Institution:
University of Oxford
Division:
MPLS Division
Department:
Physics
Oxford college:
St John's College
Role:
Author
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Publisher:
American Physical Society Publisher's website
Journal:
Physical Review A Journal website
Volume:
99
Pages:
021601(R)
Publication date:
2019-02-01
Acceptance date:
2019-01-11
DOI:
EISSN:
1094-1622
ISSN:
1050-2947
Pubs id:
pubs:935837
URN:
uri:1978c8b5-53be-46c9-8b7c-486e87add421
UUID:
uuid:1978c8b5-53be-46c9-8b7c-486e87add421
Local pid:
pubs:935837

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