From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate
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...
| Main Authors: | , , , , , , , |
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| Format: | Journal article |
| Published: |
American Physical Society
2019
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| _version_ | 1797056141783465984 |
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| author | Garratt, S Eigen, C Zhang, J Turzák, P Lopes, R Smith, R Hadzibabic, Z Navon, N |
| author_facet | Garratt, S Eigen, C Zhang, J Turzák, P Lopes, R Smith, R Hadzibabic, Z Navon, N |
| author_sort | Garratt, S |
| collection | OXFORD |
| description | 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. |
| first_indexed | 2024-03-06T19:19:12Z |
| format | Journal article |
| id | oxford-uuid:1978c8b5-53be-46c9-8b7c-486e87add421 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:19:12Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | oxford-uuid:1978c8b5-53be-46c9-8b7c-486e87add4212022-03-26T10:49:13ZFrom single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensateJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1978c8b5-53be-46c9-8b7c-486e87add421Symplectic Elements at OxfordAmerican Physical Society2019Garratt, SEigen, CZhang, JTurzák, PLopes, RSmith, RHadzibabic, ZNavon, NWe 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. |
| spellingShingle | Garratt, S Eigen, C Zhang, J Turzák, P Lopes, R Smith, R Hadzibabic, Z Navon, N From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate |
| title | From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate |
| title_full | From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate |
| title_fullStr | From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate |
| title_full_unstemmed | From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate |
| title_short | From single-particle excitations to sound waves in a box-trapped atomic Bose-Einstein condensate |
| title_sort | from single particle excitations to sound waves in a box trapped atomic bose einstein condensate |
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